[1] Mathematics Competitions, Journal of the WFNMC, Australia.
[2] Matematiˇcke olimpijade (Mathematical Olympiads), Element, Zagreb, 1997.
[3] Zˇ. Matjaˇz, Altius, Citius, Fortius, The Society of Mathematics, Physics and Astronomy of Slovenia, Ljubljana, 1995.
[4] 40. National Math Olympiads in Slovenia, The Society of Mathematics, Physics and Astronomy of Slovenia, Ljubljana, 1995.
[5] IX & XIX International Mathematical Olympiads, Mathematicians Society of Serbia, Beograd, 1997.
[6] International and Balkan Mathematical Olympiads, 1984-1995, Mathematicians Society of Serbia, Beograd, 1996.
[7] Problems of the Austrian-Polish Mathematical Competition, 1978-1993, The Academic Distribution Center, Freeland, Maryland, 1994.
[8] USA Mathematical Olympiads 1972-1986, The Mathematical Association of America, 1988.
[9] The Canadian Mathematical Olympiad 1969-1993, Canadian Mathematical Society, Toronto, 1993.
[10] A. Gardner, The Mathematical Olympiad Handbook - An Introduction to Problem Solving, Oxford University Press, Oxford-New York-Tokyo, 1997.
[11] A. Engel, Problem-Solving Strategies, Springer-Verlag New York, Inc., 1998.
[12] Matematiˇcko-fiziˇcki list, Zagreb.
[13] Mathematics and Informatics Quarterly, International journal for mathematics for secondary school students.
[14] Editions of Elementary Mathematics, Mathematical Competitions, Element, Zagreb.