Referências

Everitt, Brian S., and Torsten Hothorn. 2003. A Handbook of Statistical Analyses Using r.
Laurie, J, C Moertel, T Fleming, H Wieand, J Leigh, J Rubin, G McCormack, J Gerstner, J Krook, and J Malliard. 1989. “Surgical Adjuvant Therapy of Large-Bowel Carcinoma: An Evaluation of Levamisole and the Combination of Levamisole and Fluorouracil: The North Central Cancer Treatment Group and the Mayo Clinic.” J Clinical Oncology 7: 1447–56.
Little, Roderick J. A. 1988. “A Test of Missing Completely at Random for Multivariate Data with Missing Values.” Journal of the American Statistical Association 83 (404): 1198–1202.
Rabe-Hesketh, S, and A Skronda. 2008. Multilevel and Longitudinal Modeling Using STATA.