@article{Gompertz1825,
author = {Gompertz, B.},
title= {On the nature of the function expressive of the law of human mortality, and on a new mode of determining the value of life contingencies. In a letter to Francis Baily, Esq},
year = {1825},
doi = {10.1098/rspl.1815.0271},
volume = {115},
pages = {513--583},
}