1. Knuth, D. E.: The Art of Computer Programming, Vol. 2. Seminumerical Algorithms, Addison-Wesley, Reading, Mass. 1975, Chap. 3.4.
2. Zupan, J., Algorithms for Chemists, Wiley, Chichester 1989, Chap. 3.3.
3. for example: BesAna, v 2.03, (Spell-checking Program for Slovenian Texts), Instruction Manual, Amebis, d.o.o., Kamnik, Slovenia 1993, and J. Zupan, SLONCEK Spell-check program for Slovenian Language (in Slovenian), Informatica 15, (1993)(3), 21–32.
4. Dictionary of the Slovenian Literary Language, DZS, Ljubljana, 1994 (available on CD-ROM).
5. Zupan, J.: Extended version of the Root-Dictionary of Slovenian Language (mentioned in Zupan’s article in the newspaper DELO, 5th February 1998, p. 16).