1. 1. Akperov Z (2000) Sugar beet in Azerbaijan. In: Maggioni L, Frese L, Germeier CU, Lipman E
2. 2. (eds) Report of a Working Group on Beta. First meeting, 9-10 Sept 1999, Broom's Barn, Higham, Bury St. Edmunds, United Kingdom. IPGRI, Rome, Italy, pp 18-19
3. 3. Aleksidze G, Akparov Z, Melikyan A, Arjmand MN (2009) Biodiversity of Beta species in the Caucasus Region (Armenia, Azerbaijan, Georgia, Iran). In: Frese L, Maggioni L, Lipman E
4. 4. (eds) Report of a Working Group on Beta and the World Beta Network. Third Joint Meeting, 8-11 Mar 2006, Puerto de la Cruz, Tenerife, Spain. Bioversity International, Rome, Italy, pp 38-44
5. Ascherson P, Graebner P (1919) Synopsis der mitteleuropaischen Flora. Verlag von Gebrüder Borntraeger, Lipsia, Germany