Кісь, С. Я., and Г. Р. Кісь. “Processes of Intellectualization of Business Activities of Enterprises on the Oil and Gas Industry: Diagnostics of Employees”. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas (Series: Economics and Management in the Oil and Gas Industry), vol. 2, no. 14, May 2018, pp. 26-35, https://eung.nung.edu.ua/index.php/ecom/article/view/25.