Hrabovetskyi BY, Chaplyhina OV, Koziar LV. METHODS OF MEASURING OF LEVEL OF PRODUCTION CONCENTRATION AND INFLUENCE OF SIZE OF ENTERPRISE ON ITS EFFICIENCY. Вісник ВПІ [Internet]. 2015Dec.18 [cited 2025Apr.3];(5):41-9. Available from: https://visnyk.vntu.edu.ua./index.php/visnyk/article/view/1825