by Garba, S.H., Dalori, B.M., Hamman, L.L., Mshelia, I.Y.
Published in Research journal of applied sciences, engineering and technology (01.01.2013)

by Hamman, L.L., Zirahei, J.V., Amali, F., Amaza, D.S., Goji, A.D.T., Mari, H.
Published in International journal of advanced research (Indore) (31.10.2016)

by Miller, M.F. (Texas Tech University, Lubbock.), Huffman, K.L, Gilbert, S.Y, Hamman, L.L, Ramsey, C.B
Published in Journal of animal science (01.08.1995)