Malaurie, Bernard, Marie-France Trouslot, Julien Berthaud, Mustapha Bousalem, Agnès Pinel, and Jean Dubern. 1998. “Medium-Term and Long-Term in Vitro Conservation and Safe International Exchange of Yam (Dioscorea spp.) Germplasm”. Electronic Journal of Biotechnology 1 (3). Valparaíso, Chile:0-0. https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v1n3-2.