Lázár J, Mikulás J, Farkas G, Kölber M. Certification programme for production of virus-free propagating material of grapevine and its results in Hungary. Int. j. hortic. sci. [Internet]. 2002 Oct. 16 [cited 2024 Dec. 19];8(3-4):39-43. Available from: https://ojs.lib.unideb.hu/IJHS/article/view/360