APA (7th ed.) Citation

Khrypunov, H. S., & Khrypunova, A. L. (2015). Historical Background and Analysis of Photovoltaics in the 50-ies of XX Century.

Chicago Style (17th ed.) Citation

Khrypunov, H. S., and A. L. Khrypunova. Historical Background and Analysis of Photovoltaics in the 50-ies of XX Century. 2015.

MLA (8th ed.) Citation

Khrypunov, H. S., and A. L. Khrypunova. Historical Background and Analysis of Photovoltaics in the 50-ies of XX Century. 2015.

Warning: These citations may not always be 100% accurate.