Evaluation of In Vitro-Derived Hop Plantlets, cv. Columbus and Magnum, as Potential Source of Bioactive Compounds oleh Leandra Leto, Claudia Favari, Anna Agosti, Lorenzo Del Vecchio, Andrea Di Fazio, Letizia Bresciani, Pedro Mena, Valeria Guarrasi, Martina Cirlini, Benedetta Chiancone