@article{GDZPPN002285460,
title = {On Disjunctions and Existential Statements in Intuitionistic Systems of Logic.},
journal = {Mathematische Annalen},
volume = {132},
year = {1956},
pages = {347-361},
zbl = {0071.24504},
url = {http://dml.mathdoc.fr/item/GDZPPN002285460}
}
Harrop, R. On Disjunctions and Existential Statements in Intuitionistic Systems of Logic.. Mathematische Annalen, Tome 132 (1956) pp. 347-361. http://gdmltest.u-ga.fr/item/GDZPPN002285460/