@article{1102905667,
author = {Elwin, John D. and Short, Donald R.},
title = {Branched immersions between $2$-manifolds of higher topological type.},
journal = {Pacific J. Math.},
volume = {61},
number = {2},
year = {1975},
pages = { 361-370},
language = {en},
url = {http://dml.mathdoc.fr/item/1102905667}
}
Elwin, John D.; Short, Donald R. Branched immersions between $2$-manifolds of higher topological type.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 361-370. http://gdmltest.u-ga.fr/item/1102905667/