@article{04127977, title = {A characterization of the Hall planes by planar and nonplanar involutions.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {12}, year = {1989}, pages = {781-785}, doi = {10.1155/S0161171289000955}, zbl = {0688.51003}, language = {en}, url = {http://dml.mathdoc.fr/item/04127977} }
Johnson, N.L. A characterization of the Hall planes by planar and nonplanar involutions.. International Journal of Mathematics and Mathematical Sciences, Tome 12 (1989) pp. 781-785. doi : 10.1155/S0161171289000955. http://gdmltest.u-ga.fr/item/04127977/