The influence of dietary energy concentration and feed intake level on feedlot steers: 2. Feed intake, live mass-gain, gut fill, carcass gain and visual and physical carcass measurements Slabbert, N.; Campher, J.P.; Shelby, T.; Leeuw, K.J.; Kuhn, G.P.; Meissner, H.H. Suid Afrikaanse Tydskrif vir Veekunde 22(4): 107-114 1992 https://eurekamag.com/research/009/589/009589471.php