1. Categorical Data Analysis;Agresti,1990
2. Diagnostics in categorical data analysis;Andersen;J. Roy. Statist. Soc. B,1992
3. Finding the outliers that matter;Andrews;J. Roy. Statist. Soc. B,1978
4. Penalised minimum disparity methods for multinomial models;Basu;Statist. Sinica,1998
5. Regression Diagnostics: Identifying Influential Data and Sources of Collinearity;Belsley,1980