@article{GDZPPN002413671,
title = {Equiangular Lines, the Graph Extension Theorem, and Transfer in Triply Transitive Groups.},
journal = {Mathematische Zeitschrift},
volume = {135},
year = {1973},
pages = {111-124},
zbl = {0351.20002},
url = {http://dml.mathdoc.fr/item/GDZPPN002413671}
}
Hale, Mark P. jr.; Shult, Ernest E. Equiangular Lines, the Graph Extension Theorem, and Transfer in Triply Transitive Groups.. Mathematische Zeitschrift, Tome 135 (1973) pp. 111-124. http://gdmltest.u-ga.fr/item/GDZPPN002413671/