1. Jensen, L. S., 1969. Leg weakness in turkeys. Hoffman-Taff Research Report. No. 101.
2. Yield evaluation of d-biotin supplementation for biotin deficient turkey poults and older turkeys;Johnson;Poultry Sci.,1967
3. The nutritional significance of biotin in chick and poult nutrition;Patrick;Poultry Sci.,1942
4. Richardson, C. E., and H. S. Wilgus, 1967. Biotin?a limiting factor in turkey rations? Feedstuffs, August 12, pp. 52-54.