@article{WBLN_2020__7__A2_0, author = {Petronio, Carlo}, title = {The {Hurwitz} existence problem for surface branched covers}, booktitle = {Winter Braids X (Pisa, 2020)}, series = {Winter Braids Lecture Notes}, note = {talk:2}, pages = {1--43}, publisher = {Winter Braids School}, year = {2020}, doi = {10.5802/wbln.34}, language = {en}, url = {http://www.numdam.org/articles/10.5802/wbln.34/} }