Martin, FW; Ortiz, Sonia (1963). "Origin and Anatomy of Tubers of Dioscorea Floribunda and D. Spiculiflora". Botanical Gazette. 124 (6): 416–421. doi:10.1086/336228. JSTOR2473209. S2CID84746878.
J. Allemann; P.J. Robbertse; P.S. Hammes (20 June 2003). "Organographic and anatomical evidence that the edible storage organs of Plectranthus esculentus N.E.Br. (Lamiaceae) are stem tubers". Field Crops Research. 83 (1): 35–39. doi:10.1016/S0378-4290(03)00054-6.
"Tuber". Online Etymology Dictionary. Archived from the original on 2016-02-15.
jstor.org
Martin, FW; Ortiz, Sonia (1963). "Origin and Anatomy of Tubers of Dioscorea Floribunda and D. Spiculiflora". Botanical Gazette. 124 (6): 416–421. doi:10.1086/336228. JSTOR2473209. S2CID84746878.
psu.edu
personal.psu.edu
"Introduction to Stems". Pennsylvania State University - Environmental Science. Monaco Educational Service. 2000. Archived from the original on 2005-04-13. Retrieved 2005-05-10.
semanticscholar.org
api.semanticscholar.org
Martin, FW; Ortiz, Sonia (1963). "Origin and Anatomy of Tubers of Dioscorea Floribunda and D. Spiculiflora". Botanical Gazette. 124 (6): 416–421. doi:10.1086/336228. JSTOR2473209. S2CID84746878.
"Introduction to Stems". Pennsylvania State University - Environmental Science. Monaco Educational Service. 2000. Archived from the original on 2005-04-13. Retrieved 2005-05-10.
"Interrelationships of the number of initial sprouts, stems, stolons and tubers per potato plant" Journal Potato Research. Springer Netherlands ISSN0014-3065 (Print) ISSN1871-4528 (Online) Volume 33, Number 2 / June 1990