GRETCHIKHIN, Leonid I. Heat pumps in aviation. Vojnotehnički glasnik / Military Technical Courier, [S. l.], v. 61, n. 2, p. 37–54, 2013. DOI: 10.5937/vojtehg61-3538. Dostupno na: https://asistent.ceon.rs/index.php/vtg/article/view/3538. Pristupljeno: 12 jul. 2026.