Kalu, B., M. Njike, and S. Ikurior. “Evaluating the Potential of <i>Tridax procumbens</i> For Livestock Feed I. Morphological Stage of Development and Chemical Composition”. Nigerian Journal of Animal Production, vol. 13, no. 1, Oct. 2015, pp. 11-22, doi:10.4314/njap.v13i1.