@inbook{Benjamin1959,
author = {Benjamin, B.},
title= {Actuarial aspects of human lifespans},
year = {1959},
editor = {Wolstenholme, G.E.W.},
editor = {O’Connor, M.},
booktitle = {CIBA Foundation Colloquia on Ageing. The life span of animals},
address = {Boston},
publisher = {Little, Brown and Company},
pages = {2--20},
}