@article{GDZPPN002058448,
title = {Geometric and algebraic intersection numbers.},
journal = {Commentarii mathematici Helvetici},
volume = {39},
year = {1964},
pages = {271-280},
zbl = {0151.32302},
url = {http://dml.mathdoc.fr/item/GDZPPN002058448}
}
Kervaire, Michel A. Geometric and algebraic intersection numbers.. Commentarii mathematici Helvetici, Tome 39 (1964) pp. 271-280. http://gdmltest.u-ga.fr/item/GDZPPN002058448/