@article{1255455261, author = {Kleinfeld, Erwin}, title = {Finite Hjelmslev planes}, journal = {Illinois J. Math.}, volume = {3}, number = {1}, year = {1959}, pages = { 403-407}, language = {en}, url = {http://dml.mathdoc.fr/item/1255455261} }
Kleinfeld, Erwin. Finite Hjelmslev planes. Illinois J. Math., Tome 3 (1959) no. 1, pp. 403-407. http://gdmltest.u-ga.fr/item/1255455261/