Citation: P. Yu et al., Effect of dietary protein variation in terms of net truly digested intestinal protein (DVE) and rumen degraded protein balance (OEB) on the concentrations and excretion of urinary creatinine, purine derivatives and microbialN supply in sheep: comparison with the prediction from the DVE/OEB model, ANIM FEED S, 93(1-2), 2001, pp. 71-91