@article{Wagstaff1991,
author = {Wagstaff, A. and Paci, P. and van Doorslaer, E.},
title= {On the measurement of inequalities in health},
year = {1991},
doi = {10.1016/0277-9536(91)90212-U},
journal = {Social Science and Medicine},
volume = {33},
number = {5},
pages = {545--557},
}