[1] BATES D. M.-WATTS D. G.: Relative curvature measures of nonlinearity. J. Roy Statist. Soc. Ser. B 42 (1980), 1-25. MR 0567196 | Zbl 0455.62028

[2] KUBÁČEK L.-KUBÁČKOVÁ L.: Regression Models with a Weak Nonlinearity. Technical Report Nr. 1998.1, Universitát Stuttgart, 1998, pp. 1-67.

[3] KUBÁČEK L.-KUBÁČKOVÁ L.: A multiepoch regression model used in geodesy. Austrian J. Statist. 28 (1999), 203-214.

[4] KUBÁČEK L.-KUBÁČKOVÁ L.: Statistics and Metrology. Univ. Palackého, Olomouc, 2000. (Czech)

[5] RAO C. R.: Linear Statistical Inference and Its Applications. John Wiley &: Sons, New York - London - Sydney, 1965. MR 0221616 | Zbl 0137.36203

[6] RAO C. R.: Generalized Inverse of Matrices and Its Applications. J. Wiley, New York-London-Sydney-Toronto, 1971. MR 0338013 | Zbl 0236.15005