Rychtecký, A. (1995). Intrinsic and exintrinsic motivation of youth towards sport activities. Physical activity for life: East and West, South and North : the proceedings of the 9. Biennial Conference of International Society for Comparative Physical Education and Sport at the Charles University, Fac. of Physical Education and Sport, Prague, Czech Republik, [July 2-7,1994], S. 265-271.

Rychtecký, Antonín. "Intrinsic and Exintrinsic Motivation of Youth Towards Sport Activities." Physical Activity for Life: East and West, South and North : The Proceedings of the 9. Biennial Conference of International Society for Comparative Physical Education and Sport At the Charles University, Fac. of Physical Education and Sport, Prague, Czech Republik, [July 2-7,1994] 1995: S. 265-271.

Rychtecký, Antonín. "Intrinsic and Exintrinsic Motivation of Youth Towards Sport Activities." Physical Activity for Life: East and West, South and North : The Proceedings of the 9. Biennial Conference of International Society for Comparative Physical Education and Sport At the Charles University, Fac. of Physical Education and Sport, Prague, Czech Republik, [July 2-7,1994] 1995: S. 265-271.