@article{MZ_1986__191_173704,
     author = {H.J.A.M. Heijmans},
     title = {Structured {Populations,} {Linear} {Semigrous} and {Positivity.}},
     journal = {Mathematische Zeitschrift},
     pages = {599--618},
     publisher = {mathdoc},
     volume = {191},
     year = {1986},
     zbl = {0595.92009},
     url = {http://geodesic.mathdoc.fr/item/MZ_1986__191_173704/}
}