APA (7th ed.) Citation

Gechev, T., Nedelchev, K., & Kralov, I. Autogiros: Review and Classification. MDPI AG.

Chicago Style (17th ed.) Citation

Gechev, Tsvetomir, Krasimir Nedelchev, and Ivan Kralov. Autogiros: Review and Classification. MDPI AG.

MLA (9th ed.) Citation

Gechev, Tsvetomir, et al. Autogiros: Review and Classification. MDPI AG.