@article{1183733825,
author = {Harrop, Ronald},
title = {Concerning Formulas of the Types $A \rightarrow B \vee C, A \rightarrow (Ex)B(x)$},
journal = {J. Symbolic Logic},
volume = {25},
number = {1},
year = {1960},
pages = { 27-32},
language = {en},
url = {http://dml.mathdoc.fr/item/1183733825}
}
Harrop, Ronald. Concerning Formulas of the Types $A \rightarrow B \vee C, A \rightarrow (Ex)B(x)$. J. Symbolic Logic, Tome 25 (1960) no. 1, pp. 27-32. http://gdmltest.u-ga.fr/item/1183733825/