BORDUNOVA , O.; SAMOKHINA , E.; KHMELNYCHYI , L.; POVOD , M.; VECHORKA , V. ZOOHYGIENIC CHARACTERISTICS OF BIOTECHNOLOGICAL METHODS OF METABOLISM REGULATING OF CHICKENS EMBRYO IN THE PROCESS OF INCUBATION. Bulletin of Sumy National Agrarian University. The series: Livestock, n. 1(44), p. 36-41, 29 Mar. 2021.