Valentova, K., Frcek, J., & Ulrichova, J. (2001). Yacon (Smallanthus sonchifolius) and Maca (Lepidium meyenii), Traditional Andean Crops as New Functional Foods on the European Market. Chemické Listy, 95(10). Získáno z http://ww.w.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2375