The extensive use of uncontrolled crossbreeding with exotic specialized breeds
References
Creangă, Şt., Dascălu, D. L., Ruginosu, E., Borş, I., Ilie, D. E., & Cean, A. (2013). DEMOGRAPHIC STUDY ON THE TOTAL SURA DE STEPĂ BREED POPULATION IN ROMANIA. Cercetari Agronomice in Moldova, 46(2), 85–97. https://doi.org/10.2478/v10298-012-0086-6 (in Romanian)
Porter, V., & Mason, I. L. (2002). Mason’s World Dictionary of Livestock Breeds, Types and Varieties (5th ed.). Wallingford, Oxfordshire, UK: CABI Publishing.
Porter, V., Alderson, L., Hall, S. J. G., & Sponenberg, D. P. (2016). Mason’s World Encyclopedia of Livestock Breeds and Breeding: 2 Volume Pack (1st ed.). Wallingford, Oxfordshire, UK: CABI.
Socol, C. T., Iacob, L., Mihalca, I., Criste, F. L., Șonea, C. G., & Doroftei, F. (2015). Romanian Gene Bank: Perspectives and Aspects for Farm Animal Genetic Resources Conservation. Animal Science and Biotechnologies, 48(1), 394–398.