International
International mathematical olympiads, 1978-1985 and forty supplementary problems / compiled and with solutions by Murray S. Klamkin. -- Washington, D.C. : Mathematical Association of America, 2002. -- 142 s. : il. -- (New mathematical library ; 31). -- ISBN : 0-88385-631-X (sv. 31 : brož.) ISBN (invalid) 978-0-88385-631-4. -- 0-88385-600-X (soubor).
Klamkin, Murray S., 1921-2004. Mathematical Association of America
1978-1985. matematická olympiáda. sbírky úloh
51:371.384. (076.1/.3)