Kartika Purnamasari, Andreas Berny Yulianto, and Koesnoto Supranianondo, “Utilization of BioMC4 Probiotic Supplementation in Livestock Feed as An Effort to Enhance Animal Health and Productivity in Jombang Regency”, Kontribusia, vol. 9, no. 1, pp. 63–68, Jan. 2026.