@article{1178244403,
author = {Liu, Shih-chao},
title = {An enumeration of the primitive recursive functions without repetition},
journal = {Tohoku Math. J. (2)},
volume = {12},
number = {3},
year = {1960},
pages = { 400-402},
language = {en},
url = {http://dml.mathdoc.fr/item/1178244403}
}
Liu, Shih-chao. An enumeration of the primitive recursive functions without repetition. Tohoku Math. J. (2), Tome 12 (1960) no. 3, pp. 400-402. http://gdmltest.u-ga.fr/item/1178244403/