Jēkabsons, Gints, Jurijs Lavendels, and Vjaceslavs Sitikovs. “Model Evaluation and Selection in Multiple Nonlinear Regression Analysis”. Mathematical Modelling and Analysis 12, no. 1 (March 31, 2007): 81-90. Accessed October 26, 2020. https://journals.vgtu.lt/index.php/MMA/article/view/7096.