TY  - JOUR
AU  - Pervova, Ekaterina
AU  - Petronio, Carlo
TI  - On the existence of branched coverings between surfaces with prescribed branch data, I
JO  - Algebraic and Geometric Topology
PY  - 2006
SP  - 1957
EP  - 1985
VL  - 6
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.1957/
DO  - 10.2140/agt.2006.6.1957
ID  - 10_2140_agt_2006_6_1957
ER  -