1. Begründung einer strengen Implikation;Ackermann;J. Symb. Log.,1956
2. An algebraic view of super-Belnap logics;Albuquerque;Stud. Log.,2017
3. Tautological entailments;Anderson;Philos. Stud.,1962
4. Entailment: The Logic of Relevance and Necessity, vol. I;Anderson,1975
5. Tautological entailments (abstract);Belnap;J. Symb. Log.,1959