[1] B. Hostinský: Diferenciální geometrie křivek a ploch. (Differential geometry of curves and surfaces). Přírodovědecké nakladatelství JČSMF, Praha 1950.
[2] V. Jarník: Diferenciální počet II. (Differential calculus). NČSAV, Praha 1956.
[4] A. Pázman: 
Geometry of gaussian nonlinear regression - parallel curves and confidence intervals. Kybernetika 18 (1982), 376-396. 
MR 0686519 
[5] A. Pázman: 
Nonlinear least squares - uniqueness versus ambiguity. Math. Operationsforsch. Statist. Ser. Statistics 14 (1984) (to appear.) 
MR 0756337 
[6] A. Rényi: 
Teorie pravděpodobnosti. (Probability theory). Academia, Praha 1972. 
MR 0350789 
[7] S. Sternberg: 
Lectures on Differential Geometry. Second printing. Prentice-Hall, Englewood Cliffs 1965. 
MR 0193578