Habibi, Hassan (17 April 1376). "Changes in country divisions in East Azarbaijan province". Islamic Parliament Research Center (in Persian). Ministry of Interior, Political-Defense Commission of the Government Board. Archived from the original on 30 January 2014. Retrieved 6 December 2023.
nga.mil
geonames.nga.mil
Osku can be found at GEOnet Names Server, at this link, by opening the Advanced Search box, entering "-3077478" in the "Unique Feature Id" form, and clicking on "Search Database".
openstreetmap.org
OpenStreetMap contributors (25 February 2024). "Osku, Osku County" (Map). OpenStreetMap (in Persian). Retrieved 25 February 2024.
Habibi, Hassan (17 April 1376). "Changes in country divisions in East Azarbaijan province". Islamic Parliament Research Center (in Persian). Ministry of Interior, Political-Defense Commission of the Government Board. Archived from the original on 30 January 2014. Retrieved 6 December 2023.