diff --git a/formrsctlk.cc b/formrsctlk.cc
index 6921548..9260769 100644
--- a/formrsctlk.cc
+++ b/formrsctlk.cc
@@ -7,6 +7,7 @@
 */
 
 #include "formrsctlk.hh"
+#include "rs.hh"
 
 std::string FormRSCTLK::toStr(void) const
 {
@@ -250,3 +251,13 @@ void FormRSCTLK::encodeActions(const SymRS *srs)
     arg[1]->encodeActions(srs);
   }
 }
+
+ProcSet FormRSCTLK::getAgentsAsProcSet(RctSys *rs) const
+{
+  ProcSet processes;
+  for (auto &a : agents)
+  {
+    processes.insert(rs->getProcessID(a));
+  }
+  return processes;
+}
diff --git a/formrsctlk.hh b/formrsctlk.hh
index 474ea5f..add62c7 100644
--- a/formrsctlk.hh
+++ b/formrsctlk.hh
@@ -43,9 +43,13 @@
 #define RSCTLK_TF      50 // true/false
 
 #define RSCTLK_NK      61 // Epistemic operators
+#define RSCTLK_NE      62
+#define RSCTLK_NC      63
 #define RSCTLK_UK      71
+#define RSCTLK_UE      72
+#define RSCTLK_UC      73
 
-#define RSCTLK_COND_1ARG(a) ((a) == RSCTLK_NOT || (a) == RSCTLK_EG || (a) == RSCTLK_EF || (a) == RSCTLK_EX || (a) == RSCTLK_AG || (a) == RSCTLK_AF || (a) == RSCTLK_AX || (a) == RSCTLK_EG_ACT || (a) == RSCTLK_EF_ACT || (a) == RSCTLK_EX_ACT || (a) == RSCTLK_AG_ACT || (a) == RSCTLK_AF_ACT || (a) == RSCTLK_AX_ACT || (a) == RSCTLK_UK || (a) == RSCTLK_NK)
+#define RSCTLK_COND_1ARG(a) ((a) == RSCTLK_NOT || (a) == RSCTLK_EG || (a) == RSCTLK_EF || (a) == RSCTLK_EX || (a) == RSCTLK_AG || (a) == RSCTLK_AF || (a) == RSCTLK_AX || (a) == RSCTLK_EG_ACT || (a) == RSCTLK_EF_ACT || (a) == RSCTLK_EX_ACT || (a) == RSCTLK_AG_ACT || (a) == RSCTLK_AF_ACT || (a) == RSCTLK_AX_ACT || (a) == RSCTLK_UK || (a) == RSCTLK_NK || (a) == RSCTLK_UE || (a) == RSCTLK_NE || (a) == RSCTLK_UC || (a) == RSCTLK_NC)
 #define RSCTLK_COND_2ARG(a) ((a) == RSCTLK_AND || (a) == RSCTLK_OR || (a) == RSCTLK_XOR || (a) == RSCTLK_IMPL || (a) == RSCTLK_EU || (a) == RSCTLK_AU || (a) == RSCTLK_EU_ACT || (a) == RSCTLK_AU_ACT)
 #define RSCTLK_COND_ACT(a) ((a) > 30 && (a) < 45)
 #define RSCTLK_IS_VALID(a) (RSCTLK_COND_1ARG(a) || RSCTLK_COND_2ARG(a) || (a) == RSCTLK_PV || (a) == RSCTLK_TF)
@@ -288,6 +292,7 @@ class FormRSCTLK
       assert(oper == RSCTLK_NK || oper == RSCTLK_UK);
       return *(agents.begin());
     }
+    ProcSet getAgentsAsProcSet(RctSys *rs) const;
 };
 
 #endif
diff --git a/mc.cc b/mc.cc
index 4d20649..1f443cf 100644
--- a/mc.cc
+++ b/mc.cc
@@ -359,6 +359,16 @@ BDD ModelChecker::getStatesRSCTLK(const FormRSCTLK *form)
     auto proc_id = srs->rs->getProcessID(form->getSingleAgent());
     return *reach - (statesNK(*reach - getStatesRSCTLK(form->getLeftSF()), proc_id) * *reach);
   }
+  else if (oper == RSCTLK_NC)
+  {
+    auto proc_set = form->getAgentsAsProcSet(srs->rs);
+    return statesNC(getStatesRSCTLK(form->getLeftSF()) * *reach, proc_set) * *reach;
+  }
+  else if (oper == RSCTLK_UC)
+  {
+    auto proc_set = form->getAgentsAsProcSet(srs->rs);
+    return *reach - (statesNC(*reach - getStatesRSCTLK(form->getLeftSF()), proc_set) * *reach);
+  }
 
   assert(0); // Should never happen
   return BDD_FALSE;
@@ -453,6 +463,25 @@ BDD ModelChecker::statesNK(const BDD &states, Process proc_id)
   return x;
 }
 
+BDD ModelChecker::statesNC(const BDD &states, ProcSet processes)
+{
+  BDD x = BDD_FALSE;
+  BDD x_p = *reach;
+
+  while (x != x_p)
+  {
+    x_p = x;
+    BDD t = BDD_FALSE;
+    for (auto const &proc_id : processes)
+    {
+      t += x.ExistAbstract(getIthOnly(proc_id));
+    }
+    x = t;
+  }
+
+  return x;
+}
+
 BDD ModelChecker::getIthOnly(Process proc_id)
 {
   /* if possible, we return the BDD from cache */
diff --git a/mc.hh b/mc.hh
index 663d3bd..1274f61 100644
--- a/mc.hh
+++ b/mc.hh
@@ -61,13 +61,14 @@ class ModelChecker
     BDD statesEUctx(const BDD *contexts, const BDD &statesA, const BDD &statesB);
     BDD statesEFctx(const BDD *contexts, const BDD &states);
     BDD statesNK(const BDD &states, Process proc_id);
+    BDD statesNC(const BDD &states, ProcSet processes);
 
     BDD getIthOnly(Process proc_id);
 
     void cleanup(void);
 
     void reorder(void);
-    
+
   public:
     ModelChecker(SymRS *srs, Options *opts);
 
diff --git a/rsin_parser.yy b/rsin_parser.yy
index 3d1f688..ebece8b 100644
--- a/rsin_parser.yy
+++ b/rsin_parser.yy
@@ -39,7 +39,8 @@ class rsin_driver;
     // Entity_f *ent;
     // Action_f *act;
     // ActionsVec_f *actionsVec;
-	StateConstr *fstc;
+    StateConstr *fstc;
+    Agents_f *agents;
 };
 
 %code {
@@ -67,6 +68,7 @@ class rsin_driver;
 // %type <act> action
 // %type <actionsVec> actions
 %type <fstc> state_constr
+%type <agents> agents;
 
 //%printer    { yyoutput << *$$; } "identifier"
 %destructor { delete $$; } "identifier"
@@ -330,6 +332,19 @@ state_constr: IDENTIFIER DOT IDENTIFIER {
 //     }
 //     ;
 
+agents:
+    IDENTIFIER {
+      Agents_f *ag = new Agents_f;
+      ag->insert(*$1);
+      free($1);
+      $$ = ag;
+    }
+    | agents COMMA IDENTIFIER {
+      $1->insert(*$3);
+      free($3);
+      $$ = $1;
+    }
+
 rsctlk_form:
     IDENTIFIER DOT IDENTIFIER {
         $$ = new FormRSCTLK(*$1, *$3);
@@ -378,16 +393,20 @@ rsctlk_form:
     | AG rsctlk_form {
         $$ = new FormRSCTLK(RSCTLK_AG, $2);
     }
-    | UK LSB IDENTIFIER RSB LRB rsctlk_form RRB {
-        Agents_f agents;
-        agents.insert(*$3);
-        $$ = new FormRSCTLK(RSCTLK_UK, agents, $6);
+    | UK LSB agents RSB LRB rsctlk_form RRB {
+        $$ = new FormRSCTLK(RSCTLK_UK, *$3, $6);
         free($3);
     }
-    | NK LSB IDENTIFIER RSB LRB rsctlk_form RRB {
-        Agents_f agents;
-        agents.insert(*$3);
-        $$ = new FormRSCTLK(RSCTLK_NK, agents, $6);
+    | NK LSB agents RSB LRB rsctlk_form RRB {
+        $$ = new FormRSCTLK(RSCTLK_NK, *$3, $6);
+        free($3);
+    }
+    | UE LSB agents RSB LRB rsctlk_form RRB {
+        $$ = new FormRSCTLK(RSCTLK_UE, *$3, $6);
+        free($3);
+    }
+    | NE LSB agents RSB LRB rsctlk_form RRB {
+        $$ = new FormRSCTLK(RSCTLK_NE, *$3, $6);
         free($3);
     }
 
diff --git a/types.hh b/types.hh
index b49eb62..9d69bf7 100644
--- a/types.hh
+++ b/types.hh
@@ -30,6 +30,7 @@ struct Reaction {
 typedef unsigned int Process;
 typedef std::vector<std::string> ProcessesById;
 typedef std::map<std::string, Process> ProcessesByName;
+typedef std::set<Process> ProcSet;
 
 typedef std::vector<Reaction> Reactions;
 typedef std::map<Process, Reactions> ReactionsForProc;