Proving nondeterministically specified safety properties using progress measuresNils KlarlundFred B. Schneider1993Information and Computation
Progress measures, immediate determinacy, and a subset construction for tree automataNils Klarlund1992LICS 1992
Progress measures for complementation ω-automata with applications to temporal logicNils Klarlund1991FOCS 1991
Rabin measures and their applications to fairness and automata theoryNils KlarlundDexter Kozen1991LICS 1991