http://www.sciencedirect.com/science/article/B6V8K-44VG4WC-1/2/cd424239ffaa9d9389d83365749b79df
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V8K-44VG4WC-1-S&_cdi=5873&_user=984616&_orig=na&_coverDate=05%2F31%2F2002&_sk=999789996&view=c&wchp=dGLbVtb-zSkWA&md5=35b9611f25e31e9d4553a7b0b8f01697&ie=/sdarticle.pdf

They propose an alternative approach which is more closely linked to the WHO concept of equity in health and is also consistent with the ethical principles espoused by Rawls........(Au) (vol. 21, issue 3, May 2002, pp.497-513)