@article{CMH_1986__61_140057,
     author = {Andr\'as Sz\"ucs},
     title = {The linking number of singular maps.},
     journal = {Commentarii mathematici Helvetici},
     pages = {360--369},
     publisher = {mathdoc},
     volume = {61},
     year = {1986},
     zbl = {0602.57021},
     url = {http://geodesic.mathdoc.fr/item/CMH_1986__61_140057/}
}