[2] Fiedler M.: 
Speciální matice a jejich použití v numerické matematice. SNTL, Praha, 1981. 
Zbl 0531.65008[3] Kobza J.: 
Spline recurrences for quartic splines. Acta Univ. Palacki. Olomuc., Fac. rer. nat. 34, Math. (1995), 75-89. 
MR 1447257 | 
Zbl 0854.41011[4] Kobza J.: 
Quartic interpolatory splines. Studia Univ. "Babes-Bolyai", Math., Cluj-Napoca, 1996 (to appear). 
MR 1644442[5] Kobza J.: Quartic smoothing splines. Proceedings of the XIth Summer School Software and Algorithms of Numerical Mathematics, Železná Ruda, University of West Bohemia-Charles University-UCMF, 1996, 122-134.
[6] Kobza J.: Splajny. VUP, Olomouc, 1993 (Textbook in Czech).
[7] Kobza J.: 
Some algorithm for computing local parameters of quartic interpolatory splines. Acta Univ. Palacki. Olomuc., Fac. rer. nat. 33, Math. 114 (1994). 
MR 1385747 | 
Zbl 0851.41009[8] Kučera R.: Complete Quadratic Spline Histogram Smoothing. Folia Fac. Sci. Nat. Univ. Masaryk Brunensis, 1996 (to appear).
[9] Spaeth H.: 
Eindimensionale Spline-Interpolations-Algorithmen. R. Oldenbourgh Verlag, 1990, 391 pp. 
MR 1208909 | 
Zbl 0701.41015