@article{Thiele1871,
author = {Thiele, T.N.},
title= {On a mathematical formula to express the rate of mortality throughout the whole of life, tested by a series of observations made use of by the Danish Life Insurance Company of 1871},
year = {1871},
doi = {10.1017/S2046167400043688},
volume = {16},
number = {5},
pages = {313--329},
}