@article{Cohen1979,
author = {Cohen, J.E.},
title= {Ergodic theorems in demography},
year = {1979},
doi = {10.1090/S0273-0979-1979-14594-4},
URL = {https://doi.org/10.1090/S0273-0979-1979-14594-4.},
volume = {1},
number = {2},
pages = {275--295},
}