@article{pal:basi05, author = {Koushik Pal and Robert K. Meyer}, title = {Basic Relevant Theories for Combinators at Levels I and II}, journal = {The Australasian Journal of Logic}, year = 2005, volume = 3, pages = {14-32}, URL = {http://www.philosophy.unimelb.edu.au/ajl/2005/}, }