@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/}
}