%0 Conference Proceedings
%T Useful Period for Some Generalized Gamma Type Distributions with Bathtub Shaped Failure Rate Function
%A Parsa, Motahareh
%A  Mohtashami Borzadaran, Gholam Reza
%A  Rezaei Roknabadi, Abdolhamid
%J یازده همین کنفرانس آمار ایران
%D 2012