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@article{MAN_1967__172_161589, author = {J.H. de Boer}, title = {The {Intersection} {Multiplicity} of a {Connected} {Component}}, journal = {Mathematische Annalen}, pages = {238--246}, publisher = {mathdoc}, volume = {172}, year = {1967}, zbl = {0148.41704}, url = {http://geodesic.mathdoc.fr/item/MAN_1967__172_161589/} }
J.H. de Boer. The Intersection Multiplicity of a Connected Component. Mathematische Annalen, Tome 172 (1967), pp. 238-246. http://geodesic.mathdoc.fr/item/MAN_1967__172_161589/