@article{JAC_2010__32_2_a2,
     author = {Cavalieri, Renzo and Johnson, Paul and Markwig, Hannah},
     title = {Tropical {Hurwitz} numbers},
     journal = {Journal of Algebraic Combinatorics},
     pages = {241--265},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2010__32_2_a2/}
}