1. Wing, R. R., & Hill, J. O. (2001). Successful weight loss maintenance. Annual review of nutrition21(1), 323-341. 
  2. Shiffman, M. L., Sugerman, H. J., Kellum, J. M., Brewer, W. H., & Moore, E. W. (1991). Gallstone formation after rapid weight loss: a prospective study in patients undergoing gastric bypass surgery for treatment of morbid obesity. American Journal of Gastroenterology (Springer Nature)86(8).