Abubaker, A. A, & El-Dahmane, B, H. (2007). Evaluation of olive oil leaves as a feed for small ruminant animals. Msc Thesis University of El-Fateh, Faculty of Agriculture, Animal Production Department.
Abubaker, A. A, and Ali, G. (2008). Effect of feed blocks on average daily gain of lambs grazing on crops residual. Msc Thesis University of El-Fateh, Faculty of Agriculture, Animal Production Department.
Abubaker, A. A, and El Mariami, A. (1993). Goats fed treated seaweed with urea and molasses. Un-published data.
Abubaker, A. A, and Makke, F. (1986). Effect of feeding urea on Barbary sheep performance. Agriculture Research center.
Abubaker, A. A, El Mariami, and El-Dahmani, M. (1992). Using seaweed in feeding goats. Un-published data.
Ben Salem. H, A. Nefzaoui, and Abdouli. A. (1994). Palate of shrubs and fodder trees measured on sheep and dromedaries: Methodological approach. Animal Feed Science and Technology 46: 143 – 153.
Bushwereb, M. L, and Rabeie, H, M. (1978). Response of local Barbary sheep fed urea as a source of protein in daily feeding. Animal Production Unit – Agriculture Research Centre.
Chalupa, W. (1968). Problems in feeding urea to ruminants. Journal of Animal Science. 27:207–219.
Genin. D. (2005). Utilisation traditionnelle d une resource fourragere locale (Stipa tenacissima) en montagne aride tunisienne. Perspective Socio-Technique In: Georgoudis, A., Rosati, A. Mosconi, C. (Eds), Animal Production and Natural Resources Utlisation in the Mediterranea Mountains: EAAP Publication no. 115, Wageninge Academic Publishers, pp 614 – 619.
International Center for Agriculture Research in Dry Area. (2006). Feed blocks technology in west Asia and North Africa.
Luginbuhl, J. M. J. P. Mueller and Poore, M. H. (2002). Forage Needs for Meat Goats and Sheep. Production and Utilization of Pastures and Forages" - Technical Bulletin 305
North Carolina Agricultural Research Service, North Carolina State University.
Magalhães, K. A. S. C. Valadares Filho, R. F. D. Valadares, M. L. Paixão, D. S. Pina, P. V. R. Paulino, M. L. Chizzotti, M. I. Marcondes, A. M. Araújo, and Porto, M. O. (2005). Produção de proteína microbiana, concentração plasmática de uréia e excreções de uréia em novilhos alimentados com diferentes níveis de uréia ou casca de algodão. Rev. Bras. Zootec. 34:1400–1407.
Nefzaoui. A, Chriyaa, A, and El-Masri, M, Y. (1997). Review of the research in North Africa on cereal straw use in animal feeding. Mashreq/ Maghreb Project.
Nutrient Requirements of Dairy cattle. (2001). National Academy Press. Constitution Avenue, NW. Washington, DC.
Reid, J. T. (1953). Urea as a protein replacement for ruminants: A review. Journal of Animal Science. 12:955–996.
Rennó, L. N. S. C. Valadares Filho, R. F. D. Valadares, P. R. Cecon, A. A. Backes, F. P. Rennó, D. D. Alves, and Silva, P. A. (2005).. Níveis de uréia na ração de novilhos de quatro grupos genéticos: consumo e digestibilidades totais. Rev. Bras. Zootec. 24:363–370.
Salem. H, S and Faze. M. (2008). Feeding halfa hay and barley straw treated and untreated by 4% urea on Barbary lambs performance. Msc Thesis University of El-Fateh, Faculty of Agriculture, Animal Production Department.
Salem. H, S, and Nezar, S. (2008). Evaluate treated olive tree leaves and barley straw by using urea as a roughage source for lambs performances. Msc Thesis University of El-Fateh, Faculty of Agriculture, Animal production department.
Tayer, S. R, Abubaker, A. A, and Kanoon, A, H. (1987). Evaluation of dissolved olive oil cake as a feed for ruminant animals, using Barbary lambs. Veterinarski Arhiv. 57: 15 - 19.
Tayer, S. R, and Adeal, A, M. (2007). The benefit of seaweed as filling feed for local goats. M.sc Thesis University of El-Fateh, Faculty of Agriculture, Animal Production Department.
Tayer, S. R, and Refuge, M, T. (2008). Effects of feeding olive oil cake silage on Barbary sheep performance. Msc Thesis University of El-Fateh, Faculty of Agriculture, Animal production department.