Jean-Jacques Lévy. An algebraic interpretation of the lambda beta - calculus and a labeled lambda - calculus. In Corrado Böhm, editor, Lambda-Calculus and Computer Science Theory, Proceedings of the Symposium Held in Rome, March 25-27, 1975. Volume 37 of Lecture Notes in Computer Science, pages 147-165, Springer, 1975.
Abstract is missing.