Decision problems associated with complete deterministic normal systems.Published in:Mathematical Logic Quarterly, 1969, v. 15, n. 19, p. 299, doi. 10.1002/malq.19690151903By:Axt, Paul;Singletary, W. E.Publication type:Article
A probabilistic machine for the estimation of provability in the first order predicate calculus.Published in:Mathematical Logic Quarterly, 1969, v. 15, n. 19, p. 291, doi. 10.1002/malq.19690151902By:van Westrhenen, S. C.Publication type:Article
Extensions of non-standard models of number theory.Published in:Mathematical Logic Quarterly, 1969, v. 15, n. 19, p. 289, doi. 10.1002/malq.19690151901By:Adler, AndrewPublication type:Article