Mamatov Xurshid Abdirafievich, et al. “SIMMENTAL ZOTI SIGIRLARINING YELINI SHAKLI VA SIFATINI O‘RGANISH ”. Ta’lim Innovatsiyasi Va Integratsiyasi, vol. 42, no. 2, Mar. 2025, pp. 77-79, https://scientific-jl.com/tal/article/view/6695.