@article{GDZPPN002200414,
title = {On a nonlinear integral equation modelling an epidemic in an age-structured population.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {341},
year = {1983},
pages = {54-67},
zbl = {0514.92027},
url = {http://dml.mathdoc.fr/item/GDZPPN002200414}
}
Gripenberg, Gustaf. On a nonlinear integral equation modelling an epidemic in an age-structured population.. Journal für die reine und angewandte Mathematik, Tome 341 (1983) pp. 54-67. http://gdmltest.u-ga.fr/item/GDZPPN002200414/