In 1976 he was part of the Hungarian team which finished sixth in the Olympic tournament. He played all five matches and scored fifteen goals. Four years later he finished fourth with the Hungarian team in the 1980 Olympic tournament. He played three matches and scored three goals.
- "István Szilágyi". sport-reference.com. Retrieved 2010-01-28.
- "Men's Handball World Championships" (in Hungarian). nemzetisport.hu. Retrieved 2010-01-28.
- "Minden kész a kézilabda Eb-re Ausztriában (Everything is ready for the European Handball Championship in Austria)" (in Hungarian). infovilag.hu. Retrieved 2010-01-28.
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