Bazie B, Gebru Weldemariam N and Haftu B 2019:
Chemical composition and in-vitro digestibility of cultivars of cactus pear (Opuntia ficus-indica) cladodes in Ganta-Afeshum district, Tigray, Ethiopia.
Livestock Research for Rural Development. Volume 31, Article #68.
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, from http://www.lrrd.org/lrrd31/5/nigus31068.html