@article{GDZPPN002540819, title = {Natural Numbers In Illative Combinatory Logic.}, journal = {Revista colombiana de matematicas}, volume = {19}, year = {1985}, pages = {31-42}, zbl = {0612.03012}, url = {http://dml.mathdoc.fr/item/GDZPPN002540819} }
Bunder, M.W. Natural Numbers In Illative Combinatory Logic.. Revista colombiana de matematicas, Tome 19 (1985) pp. 31-42. http://gdmltest.u-ga.fr/item/GDZPPN002540819/