1. 1) Hosmer, D.W., Lemeshow, S. (2000). Applied Logistic Regression. 2nd Edition. New York: John Wiley & Sons.
2. 2) Brown, B.W., Efron, B., Hyde, J., Leurgans, S., Miller, R.G., Moses, L.E., Wong, S., Wolfe, R. (1976). Biostatistics Case Book. Volume 1. Technical Report No. 21. Stanford: Division of Biostatistics, Stanford University.