@article{10_1090_S0894_0347_09_00633_X,
     author = {Berestycki, Henri and Hamel, Fran\~A{\textsection}ois and Nadirashvili, Nikolai},
     title = {The speed of propagation for {KPP} type problems. {II:} {General} domains},
     journal = {Journal of the American Mathematical Society},
     pages = {1--34},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2010},
     doi = {10.1090/S0894-0347-09-00633-X},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-09-00633-X/}
}