Soares Cruz, M.C., Véras, A.S.C., Ferreira, M. de A., Batista, A.M.V., Santos, D.C. dos and Coelho, M.I. de S. 2008. <b>Nitrogen balance and endogenous loss estimate in lactating cows fed with diets of forage cactus and increasing levels of urea and cassava</b&gt; - DOI: 10.4025/actascianimsci.v28i1.848. Acta Scientiarum. Animal Sciences. 28, 1 (Feb. 2008), 47-56. DOI:https://doi.org/10.4025/actascianimsci.v28i1.848.