@article{CMH_1964__39_139291,
     author = {Michel A. Kervaire},
     title = {Geometric and algebraic intersection numbers.},
     journal = {Commentarii mathematici Helvetici},
     pages = {271--280},
     publisher = {mathdoc},
     volume = {39},
     year = {1964},
     zbl = {0151.32302},
     url = {http://geodesic.mathdoc.fr/item/CMH_1964__39_139291/}
}