@article{Takada1998,
author = {Takada, T. and Nakajima, H.},
title= {Theorems on the invasion process in stage-structured populations with density-dependent dynamics},
year = {1998},
doi = {10.1007/s002850050111},
journal = {Journal of Mathematical Biology },
volume = {36},
number = {5},
pages = {497--514},
}