@article{article49c81d56,
title   = {An improved likelihood ratio test for varying dispersion in exponential family nonlinear models},
author = {Cysneiros, Audrey Helen Mariz de Aquino and Ferrari, Sílvia Lopes de Paula},
year = {2006},
doi = {10.1016/j.spl.2005.08.010},
journal   = {Statistics and Probability Letters}
}