@article{1183395172, author = {Heyting, A.}, title = {On Weakened Quantification}, journal = {J. Symbolic Logic}, volume = {11}, number = {1}, year = {1946}, pages = { 119-121}, language = {en}, url = {http://dml.mathdoc.fr/item/1183395172} }
Heyting, A. On Weakened Quantification. J. Symbolic Logic, Tome 11 (1946) no. 1, pp. 119-121. http://gdmltest.u-ga.fr/item/1183395172/