A. A. Beshir and S. A. Babiker, “Performance of Sudanese Desert Lambs Fed Graded Levels of Roselle (Hibiscus sabdariffa) Seeds Instead of Groundnut Cake”, Pak. J. Nutr., vol. 8, no. 9, pp. 1442–1445, Aug. 2009, doi: 10.3923/pjn.2009.1442.1445.