Counting connected components of the complement of the image of a codimension 1 map
Compositio Mathematica, Tome 93 (1994) no. 1, p. 37-47
@article{CM_1994__93_1_37_0,
     author = {Nu\~no Ballesteros, Juan J.},
     title = {Counting connected components of the complement of the image of a codimension $1$ map},
     journal = {Compositio Mathematica},
     publisher = {Kluwer Academic Publishers},
     volume = {93},
     number = {1},
     year = {1994},
     pages = {37-47},
     zbl = {0833.55006},
     mrnumber = {1286797},
     language = {en},
     url = {http://http://www.numdam.org/item/CM_1994__93_1_37_0}
}
Nuño Ballesteros, Juan J. Counting connected components of the complement of the image of a codimension $1$ map. Compositio Mathematica, Tome 93 (1994) no. 1, pp. 37-47. http://www.numdam.org/item/CM_1994__93_1_37_0/

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