@inbook{Laditka2003,
author = {Laditka, S.B. and Hayward, M.D.},
title= {The evolution of demographic methods to calculate Health expectancies},
year = {2003},
editor = {Robine, J.M.},
editor = {Jagger, C.},
editor = {Crimmins, E.M.},
editor = {Suzman, R.M.},
booktitle = {Determining health expectancies},
address = {Hoboken, NJ},
publisher = {Wiley},
pages = {221--234},
}