1. Micronutrients: Metabolic Tuning - Prevention - Therapy
2. Interactions between drugs and micronutrients;Gröber;Med. Monatsschr. Pharm.,2006
3. How common is vitamin B-12 deficiency?
4. Standing Committee on the Scientific Evaluation of Dietary Reference Intakes and Its Panel on Folate, Other B Vitamins, and Choline and Subcommittee on Upper Reference Levels of Nutrients; Food and Nutrition Board; Institute of Medicine,1998
5. Neurologic aspects of cobalamin deficiency;Healton;Medicine (Baltimore),1991