@article{1102971947,
author = {Johnson, Norman L.},
title = {Derivable semi-translation planes.},
journal = {Pacific J. Math.},
volume = {35},
number = {3},
year = {1970},
pages = { 687-707},
language = {en},
url = {http://dml.mathdoc.fr/item/1102971947}
}
Johnson, Norman L. Derivable semi-translation planes.. Pacific J. Math., Tome 35 (1970) no. 3, pp. 687-707. http://gdmltest.u-ga.fr/item/1102971947/