@article{10_4153_CJM_1974_103_2,
     author = {Bourgin, D. G.},
     title = {A {Generalization} of the {Mapping} {Degree}},
     journal = {Canadian journal of mathematics},
     pages = {1109--1117},
     year = {1974},
     volume = {26},
     number = {5},
     doi = {10.4153/CJM-1974-103-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-103-2/}
}