Mattila, P Cholecalciferol and 25-hydroxycholecalciferol content of chicken egg yolk as affected by the cholecalciferol content of feed. [electronic resource] - Journal of agricultural and food chemistry Oct 1999 - 4089-92 p. digital Publication Type: Journal Article ISSN: 0021-8561 Standard No.: 10.1021/jf990183c doi Subjects--Topical Terms: Animal Feed--analysisAnimalsCalcifediol--analysisChickensCholecalciferol--analysisEgg Yolk--chemistryFemaleFood, Fortified