Ziegler, P. J., Jonnalagadda, S. S., Nelson, J. A., Lawrence, C., Baciak, B. Julkaisussa Journal of the American College of Nutrition (2002)
Ziegler, P., Sharp, R., Hughes, V., Evans, W., Khoo, C. S. Julkaisussa Journal of the American Dietetic Association (2002)
Ziegler, P. J., Nelson, J. A., Jonnalagadda, S. S. Julkaisussa International Journal of Sport Nutrition and Exercise Metabolism (1999)