@article{EJDE_2012__2012__a42,
     author = {Pan,  Shuxia},
     title = {Persistence of spreading speed for the delayed {Fisher} equation},
     journal = {Electronic journal of differential equations},
     year = {2012},
     volume = {2012},
     zbl = {1254.35117},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a42/}
}