Krstev, A. B., D. B. Krstev, B. K. Krstev, and S. Velinovska. “Data Analysis and Structural Equation Modelling for Direct Foreign Investment from Local Population”. Balkan Journal of Applied Mathematics and Informatics, Vol. 1, no. 1, Aug. 2018, pp. 49-54, https://js.ugd.edu.mk/index.php/bjami/article/view/2232.