Effects of Euphorbia hirta and virginiamycin supplementation to the diet on performance, digestibility, and intestinal microflora population in broiler chickens - Zulkifli, I; Hashemi, S R; Somchit, M N; Zunita, Z; Loh, T C; Soleimani, A F; Tang, S C (Arch Geflügelk, 2012)