@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/