@article{Yashin1985,
author = {Yashin, A. and Manton, K. and Vaupel, J.},
title= {Mortality and aging in a heterogeneous population: a stochastic process model with observed and unobserved variables},
year = {1985},
doi = {10.1016/0040-5809(85)90008-5},
journal = {Theoretical Population Biology},
volume = {27},
number = {2},
pages = {154--175},
}