Zhang, H., & Hohmann, A. (2004). Table tennis after the introduction of a 40 mm ball and the 11 point format. Science and racket sports III : the proceedings of the eighth International Table Tennis Federation sports science congress and the third world congress of science and racket sports, S. 269-276.

Zhang, Hui, and Andreas Hohmann. "Table Tennis After the Introduction of a 40 Mm Ball and the 11 Point Format." Science and Racket Sports III : The Proceedings of the Eighth International Table Tennis Federation Sports Science Congress and the Third World Congress of Science and Racket Sports 2004: S. 269-276.

Zhang, Hui, and Andreas Hohmann. "Table Tennis After the Introduction of a 40 Mm Ball and the 11 Point Format." Science and Racket Sports III : The Proceedings of the Eighth International Table Tennis Federation Sports Science Congress and the Third World Congress of Science and Racket Sports 2004: S. 269-276.