Doan B H 2000:
Effects of different levels of dietary calcium and supplemental Vitamin C on growth, survivability, leg abnormalities, total ash in the tibia, serum calcium and phosphorus in 0-4 week-old chicks under tropical conditions.
Livestock Research for Rural Development. Volume 12, Article #10.
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, from http://www.lrrd.org/lrrd12/1/doa121.htm