Bartkienė, Lina. “Increase in Organization Effectiveness Using Voive Analysis: The System Approach”. Mokslas – Lietuvos ateitis / Science – Future of Lithuania 1, no. 5 (April 13, 2011): 94-97. Accessed December 6, 2022. https://journals.vilniustech.lt/index.php/MLA/article/view/10670.