Желеф, Георгій Борисович. “History of Origin and Development of Holding Companies”. Scientific works of Kyiv Aviation Institute. Series Law Journal "Air and Space Law" 4, no. 21 (December 22, 2011): 63–66. Accessed April 17, 2026. http://jrnl.kai.edu.ua/index.php/UV/article/view/6603.