@article{01453204,
title = {Monotonicity of the number of passages in linear chains and of the basis reproduction number in epidemic models.},
journal = {Zeitschrift f\"ur Analysis und ihre Anwendungen},
volume = {19},
year = {2000},
pages = {61-75},
zbl = {0961.92028},
language = {en},
url = {http://dml.mathdoc.fr/item/01453204}
}
Müller, J.; Hadeler, K.P. Monotonicity of the number of passages in linear chains and of the basis reproduction number in epidemic models.. Zeitschrift für Analysis und ihre Anwendungen, Tome 19 (2000) pp. 61-75. http://gdmltest.u-ga.fr/item/01453204/