@inbook{Shaked2001,
author = {Shaked, M. and Spizzichino, F. },
title= {Mixtures and monotonicity of failure rate functions},
year = {2001},
editor = {Balakrishnan, N.},
editor = {Rao, C.R.},
booktitle = {Handbook of Statistics},
address = {London},
publisher = {Elsevier},
pages = {185--198},
}