Graydon, J., & Palser, S. (1999). Do females always feel vulnerable with masculine. Psychology of sport and exercise : enhancing the quality of life ; proceedings of the 10th European Congress of Sport Psychology - FEPSAC, Prague 1999. Part 1, S. 208-210, Lit..

Graydon, Jan, and Sonia Palser. "Do Females Always Feel Vulnerable With Masculine." Psychology of Sport and Exercise : Enhancing the Quality of Life ; Proceedings of the 10th European Congress of Sport Psychology - FEPSAC, Prague 1999. Part 1 1999: S. 208-210, Lit..

Graydon, Jan, and Sonia Palser. "Do Females Always Feel Vulnerable With Masculine." Psychology of Sport and Exercise : Enhancing the Quality of Life ; Proceedings of the 10th European Congress of Sport Psychology - FEPSAC, Prague 1999. Part 1 1999: S. 208-210, Lit..