D. Bates/D. Watts: Nonlinear regression analysis and its applications. Wiley 1988, 360p. N. Draper/H. Smith: Applied regression analysis. Wiley 1998, 710p. A. Gallant: Nonlinear statistical methods. Wiley 1987, 620p. D. Saville/G. Wood: Statistical methods - the geometric approach. Springer 1991, 560p. G. Seber/C. Wild: Nonlinear regression. Wiley 2003, 790p. Pds. 62.