Sultonov, K. S., and S. F. qizi . Eraliyeva. “Layering - an Effective Way of Intensive Propagation of Grapevine Seedlings”. GSC Biological and Pharmaceutical Sciences, vol. 7, no. 2, May 2019, pp. 138-40, doi:10.30574/gscbps.2019.7.2.0071.