Beunen, G., Malina, R., Claessens, A., Lefevre, J., & Thomis, M. (1999). Ulnar variance and skeletal maturity of radius and ulna in female gymnasts. Medicine and science in sports and exercise, 31(5), S. 653-657.

Beunen, G., R.M Malina, A.L Claessens, J. Lefevre, and M. Thomis. "Ulnar Variance and Skeletal Maturity of Radius and Ulna in Female Gymnasts." Medicine and Science in Sports and Exercise 31, no. 5 (1999): S. 653-657.

Beunen, G., et al. "Ulnar Variance and Skeletal Maturity of Radius and Ulna in Female Gymnasts." Medicine and Science in Sports and Exercise 31.5 (1999): S. 653-657.