@article{1183386543,
author = {Langford, C. H.},
title = {A Theorem on Deducibility for Second-Order Functions},
journal = {J. Symbolic Logic},
volume = {4},
number = {1},
year = {1939},
pages = { 77-79},
language = {en},
url = {http://dml.mathdoc.fr/item/1183386543}
}
Langford, C. H. A Theorem on Deducibility for Second-Order Functions. J. Symbolic Logic, Tome 4 (1939) no. 1, pp. 77-79. http://gdmltest.u-ga.fr/item/1183386543/