TY - JOUR A1 - Yashin, A. A1 - Manton, K. A1 - Vaupel, J. T1 - Mortality and aging in a heterogeneous population: a stochastic process model with observed and unobserved variables Y1 - 1985 DO - 10.1016/0040-5809(85)90008-5 JF - Theoretical Population Biology VL - 27 IS - 2 SP - 154 EP - -175 ER -