@article{1093956238, author = {Hermes, Hans}, title = {In memoriam: Wilhelm Ackermann (1896-1962).}, journal = {Notre Dame J. Formal Logic}, volume = {8}, number = {3}, year = {1967}, pages = { 1-8}, language = {en}, url = {http://dml.mathdoc.fr/item/1093956238} }
Hermes, Hans. In memoriam: Wilhelm Ackermann (1896-1962).. Notre Dame J. Formal Logic, Tome 8 (1967) no. 3, pp. 1-8. http://gdmltest.u-ga.fr/item/1093956238/