1. Abramowitz, M, Stegun, IA (eds) (1984) Handbook of mathematical functions with formulas, graphs, and mathematical tables. A Wiley-Interscience Publication, John Wiley, New York
2. Ainsworth L, Dean CB (2007) Detection of local and global outliers in mapping studies. Environmetrics. doi: 10.1002/env.851
3. Barndorff-Nielsen O, Cox DR (1979) Edgeworth and saddle-point approximations with statistical applications (with discussion). J R Stat Soc Ser B: Methodol 41: 279–299
4. Bates D, Sarkar D (2007) lme4: Linear mixed-effects models using S4 classes. R package version 0.99875–1
5. Breslow N (1989) Score tests in overdispersed GLM’s. In: Decarli A, Francis BJ, Gilchrist R, Seeber GUH, (eds) Statistical modelling. Springer-Verlag Inc., pp 64–74