Yacon information and growing instructions, Bekya is said to be a Korean commercial variety (although it almost certainly originated in the Andes).
Yacon - De Tuinen van MergenMetz
Yacón - eine tolle Knolle für die Küche
Yacon, New Zealand - Cultivariable
PDF) Yacon: Healthy tuberous plant
Yacon anpflanzen: Wissenswertes im Überblick - Plantura
Yacon biologique - AS importateur direct de produits
Yacón - Diana's mooie moestuin
Yacon (Smallanthus sonchifolius) - The Cultivariable Growing Guide
Organic Yacon - AS importatore diretto di prodotti naturali