@article{1183739381, author = {Penk, Anna Michaelides}, title = {Two Forms of the Axiom of Choice for an Elementary Topos}, journal = {J. Symbolic Logic}, volume = {40}, number = {1}, year = {1975}, pages = { 197-212}, language = {en}, url = {http://dml.mathdoc.fr/item/1183739381} }
Penk, Anna Michaelides. Two Forms of the Axiom of Choice for an Elementary Topos. J. Symbolic Logic, Tome 40 (1975) no. 1, pp. 197-212. http://gdmltest.u-ga.fr/item/1183739381/