1. Sievers, J., Faulstich, S., Puchta, M., Stadler, I., & Schmid, J. (2007). Long-term perspectives for balancing fluctuating renewable energy sources. Kassel, Germany: University of Kassel, Department of Efficient Energy Conversion. Available at http://desire.iwes.fraunhofer.de/files/deliverables/del_2.3.pdf
3. Lukutin, B., Surzhikova, O., & Shandarova, E. (2008). Vozobnovlyayemaya energetika v detsentralizovannom elektrosnabzhenii [Renewable energy in decentralized power supply]. Moscow: Energoatomizdat
5. Alpicair. (2015). AlpicAir gaiss-gaiss siltumsūkņi, zemes ūdens siltumsūkņi un saules kolektori [AlpicAir air-to-air heat pumps, ground water heat pumps and solar collectors]. Available at http://alpicair.lv
8. MIEL Group. (2015). “Sun Republic” v Latvii poluchil grant Yevrosoyuza [“Sun Republic” received a grant from the European Union in Latvia]. Available at http://www.miel.ru/lenta/3486/
10. Bezrukovs, V., Bezrukovs, V., Zacepins, A., & Komashilovs, V. (2015). Assessment of wind shear and wind energy potential in the Baltic Sea region of Latvia. Latvian Journal of Physics and Technical Sciences, 52(2), 26–39. doi:10.1515/lpts-2015-000910.1515/lpts-2015-0009
11. Lizuma, L., Avotniece, Z., Rupainis, S., & Teilans, A. (2013). Assessment of the present and future offshore wind power potential: a case study in a target territory of the Baltic Sea near the Latvian coast. The Scientific World Journal, 2013, 1–10. doi:10.1155/2013/12642810.1155/2013/126428374597323983619
12. Rolik, Y., & Gornostay, A. (2015). Analiz osnovnykh ekonomicheskikh pokazateley raboty vetroustanovok po rezul’tatam opyta kommercheskoy ekspluatatsii vetroparkov Latvii [Analysis of the major economic factors of the wind turbines performance based on the results of commercial service experience of the wind-farms in Latvia]. Izvestiya vysshikh uchebnykh zavedeniy i energeticheskikh ob”yedineniy SNG. Energetika [News of higher educational institutions and the energy association in CIS countries. Energetics], 2, 88–94. Available at http://rep.bntu.by/handle/data/17335
20. Sakipova, S., & Jakovics, A. (2014). Sail-type wind turbine for autonomous power supply: Possible use in Latvia. Latvian Journal of Physics and Technical Sciences, 51(6), 13–25. doi:10.1515/lpts-2014-003310.1515/lpts-2014-0033
21. Sakipova, S., Jakovics, A., Gendelis, S., Kambarova, Z., & Kussaiynov, Y. (2014). Development of a sail type wind turbine for autonomous energy supply according to climate conditions. Eurasian Physical Technical Journal, 11(2), 11–19