@article{GDZPPN002060353,
title = {Toward a Generalized Gauss-Bonnet Formula for Complete, Open Manifolds},
journal = {Commentarii mathematici Helvetici},
volume = {46},
year = {1971},
pages = {324-344},
zbl = {0223.53041},
url = {http://dml.mathdoc.fr/item/GDZPPN002060353}
}
Portnoy, Esther. Toward a Generalized Gauss-Bonnet Formula for Complete, Open Manifolds. Commentarii mathematici Helvetici, Tome 46 (1971) pp. 324-344. http://gdmltest.u-ga.fr/item/GDZPPN002060353/