Porev, V. A., і G. V. Porev. 2015. «To the Issue of Melting Zone Height Control in the Technology of Electron-Emitting Crucible-Less Zone Melting of Silicon». JOURNAL OF HYDROCARBON POWER ENGINEERING 2 (2):58-62. https://ogpe.nung.edu.ua/index.php/jhpe/article/view/37.