@article{GDZPPN002413795, title = {A Class of Translation Planes of Order 3...}, journal = {Mathematische Zeitschrift}, volume = {135}, year = {1973}, pages = {271-278}, zbl = {0284.50008}, url = {http://dml.mathdoc.fr/item/GDZPPN002413795} }
Johnson, Norman L.; Seydel, Robert E. A Class of Translation Planes of Order 3.... Mathematische Zeitschrift, Tome 135 (1973) pp. 271-278. http://gdmltest.u-ga.fr/item/GDZPPN002413795/