1. Nonlinear models, residuals and transformations;Cox;Math. Operationsforsch. Statist., Ser. Statist.,1977
2. Parameter estimation in nonlinear regression models;Bunke;Math. Operationsforsch. Statist., Ser. Statist.,1977
3. The fitting of a generalization of the logistic curve;Nelder;Biometrics,1961
4. An alternative form of a generalized logistic function;Nelder;Biometrics,1962