1. Cantalapiedra-Hijar, G., Abo-Ismail, M., Carstens, G.E., Guan, L.L., Hegarty, R., Kenny, D.A. (2018). Review: biological determinants of between animal variation in feed efficiency of growing beef cattle. Animal. 12, pp. 321–335. DOI:10.1017/ S1751731118001489.
2. Yefremov, D.V., Hnoievyi, I.V. (2010). Metabolizm pozhyvnykh rechovyn v orhanizmi vivtsematok pry vykorystanni u yikh hodivli novykh premiksiv [Metabolism of nutrients in the body of ewes when new premixes are used in their feeding]. Nauk.-tekhn. biul. IT NAAN Ukrainy [Scientific and technical Bull. IT of the National Academy of Sciences of Ukraine], no. 102, pp. 270–275.
3. Stapai, P.V., Druzhyna, O.S., Tkachuk, V.M., Sydir, N.P., Havryliak, V.V., Paraniak, N.P., Skorokhid, A.V. (2014). Vplyv aminokyslot lizynu, metioninu ta sulfuru na miasnu i vovnovu produktyvnist molodniaku ovets [Effect of amino acids lysine, methionine and sulfur on meat and wool productivity of young sheep]. Zbirnyk naukovykh prats Kharkivskoi derzhavnoi zooveterynarnoi akademii [Collection of scientific works of the Kharkiv State Zooveterinary Academy]. Kharkiv, Issue 28, Part 2, pp. 105–108.
4. Bezhenar, I.M. (2011). Orhanizatsiino-ekonomichni zasady rozvytku vivcharstva v Ukraini: istorychnyi rakurs [Organizational and economic foundations of the development of sheep breeding in Ukraine: a historical perspective]. Ekonomika APK [Economy of agro-industrial complex], no. 9, pp. 65–67.
5. Stapai, P.V., Havryliak, V.V., Tkachuk, V.M. (2011). Proteinove zhyvlennia ovets [Protein nutrition of sheep]. Efektyvni kormy ta hodivlia [Effective feed and feeding]. no. 2, pp. 24–29.