1. Akinshin A (2013) Funktsii v R. http://aakinshin.net/ru/blog/r/functions/ (in Russian)
2. Armand NA, Tishchenko YuG, Savorskiy VP, Smirnov MT, Ablyazov VS, Khaldin AA (2010) Promising space projects with L-band microwave radiometric systems. Issl Zemli Iz Kosmosa 1:20–26 (in Russian)
3. Black sea marine forecasting centre. http://bsmfc.net
4. Black sea marine forecasting centre (2010) Validation on ARGO buoys data. http://bsmfc.net/val_argo_prof.php
5. Copernicus Marine service (2018). https://marine.copernicus.eu/