1.
Micropropagation of Ulmus minor and U. minor x U. pumila from 4-year-old ramets ; Micropropagación de Ulmus minor y U. minor x U. pumila a partir de ramets de 4 años de edad
2.
Influence of Ophiostoma novo-ulmi culture filtrates on callus of elms with different susceptibility to Dutch Elm Disease ; Efecto de los filtrados de cultivos de Ophiostoma novo-ul...