Droplet-vitrification methods for apical bud cryopreservation of yacon [Smallanthus sonchifolius (Poepp. and Endl.) H. Rob.] - Hammond Hammond, Stacy D.; Viehmannova, Iva; Zamecnik, Jiri; Panis, Bartholomeus; Faltus, Milos (Springer, 2021)