@article{1183739787, author = {Lake, John}, title = {Relative Consistency of an Extension of Ackermann's Set Theory}, journal = {J. Symbolic Logic}, volume = {41}, number = {1}, year = {1976}, pages = { 465-466}, language = {en}, url = {http://dml.mathdoc.fr/item/1183739787} }
Lake, John. Relative Consistency of an Extension of Ackermann's Set Theory. J. Symbolic Logic, Tome 41 (1976) no. 1, pp. 465-466. http://gdmltest.u-ga.fr/item/1183739787/