"ІNVESTMENT PASSPORT of Sumy oblast"(PDF). investukraine.com. State Agency for Investment and National Projects of Ukraine. 2013. Archived from the original(PDF) on 13 August 2014. Retrieved 12 August 2014.
Syvak, Nina; Ponomarenko, Valerii; Khodzinska, Olha; Lakeichuk, Iryna (2011). Veklych, Lesia (ed.). Toponymic Guidelines for Map and Other Editors for International Use(PDF). scientific consultant Iryna Rudenko; reviewed by Nataliia Kizilowa; translated by Olha Khodzinska. Kyiv: DerzhHeoKadastr and Kartographia. p. 20. ISBN978-966-475-839-7. Retrieved 6 October 2020. {{cite book}}: |website= ignored (help)
"ІNVESTMENT PASSPORT of Sumy oblast"(PDF). investukraine.com. State Agency for Investment and National Projects of Ukraine. 2013. Archived from the original(PDF) on 13 August 2014. Retrieved 12 August 2014.
