Кушлик, О. Ю., and Л. І. Ріщук. “Use of Business Efficiency Control System in Strategic and Operational Activities of Enterprises”. 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. 10, Dec. 2014, pp. 110-5, https://eung.nung.edu.ua/index.php/ecom/article/view/175.