@article{IM_1979__54_142670,
     author = {A.M. Gabrielov},
     title = {Polar {Curves} and {Intersection} {Matrices} of {Singularities.}},
     journal = {Inventiones mathematicae},
     pages = {15--22},
     publisher = {mathdoc},
     volume = {54},
     year = {1979},
     zbl = {0421.32011},
     url = {http://geodesic.mathdoc.fr/item/IM_1979__54_142670/}
}