Shklarsky, D. O., Chentzov, N., & Yaglom, I. (1993). USSR Olympiad prblem book: Selected problems and theorms of elementary mathematics. Dover.
Chicago Edition CitationShklarsky, D. O., N.N Chentzov, i I.M Yaglom. USSR Olympiad Prblem Book: Selected Problems and Theorms of Elementary Mathematics. New york: Dover, 1993.
Cita MLAShklarsky, D. O., et al. USSR Olympiad Prblem Book: Selected Problems and Theorms of Elementary Mathematics. Dover, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.