@book {
author = {Reiman István},
title = {International Mathematical Olympiad 1959-2004},
year = {2010},
publisher = {Typotex Kiadó},
isbn = {978 963 279 146 3},
URL = {https://edu.interkonyv.hu/konyvek/reiman-istvan-international-mathematical-olympiad-1959-2004/}
}