Regression Analysis, R Squared, Pseudo R Squared, Adjusted R Squared, Deviance.
Colin Cameron, Frank A.G. Windmeijer, An R-squared measure of goodness of fit for some common nonlinear regression models, Journal of Econometrics, Volume 77, Issue 2, 1997, Pages 329–342, ISSN 0304–4076, https://doi.org/10.1016/S0304-4076(96)01818-0. PDF Download link N. J. D. Nagelkerke, A note