Kammala jumla mai zuwa: Šulák ya wakilci Jamhuriyar Czech a 2012 IIHF World U18 Championships, inda ya yi rikodin taimako uku a wasanni shida. Šulák ya wakilci Jamhuriyar Czech a
2014 Gasar Hockey ta Duniya ta Junior, inda bai yi rikodin maki a wasanni biyar ba.