@article{GDZPPN002216930,
title = {Uniqueness of the Inversive Plane of Order 7.},
journal = {Manuscripta mathematica},
volume = {11},
year = {1973},
pages = {21-26},
zbl = {0251.05019},
url = {http://dml.mathdoc.fr/item/GDZPPN002216930}
}
Denniston, Ralph Hugh Francis. Uniqueness of the Inversive Plane of Order 7.. Manuscripta mathematica, Tome 11 (1973) pp. 21-26. http://gdmltest.u-ga.fr/item/GDZPPN002216930/