1. IBM 1130 SUBROUTINE LIBRARY, Mathematics, User’s Guide (DK 021013), 551.
2. IBM 1130 SUBROUTINE LIBRARY, Mathematics, User’s Guide (DK 020711), 441.
3. N. Macon,Numerical Analysis, (Wiley and Sons. Inc. London 1963).
4. N. P. Carleton, W. Liller, F. L. Roesler, The Astrophysical Journal154 (1968) 385–387.
5. A. Z. Hrynkiewicz, B. Sawicka andJ. Sawicki, Proceedings of the Conference on the Application of Mössbauer Effect (Tihany 1969), 739–744.