Aitymbetova, A. N. and Issaeva, G. K. (2015) “To a question of organization and efficient management by portfolios investment in banks of second level of the RK”, Journal of Economic Research & Business Administration, 106(6), pp. 108–116. Available at: https://be.kaznu.kz/index.php/math/article/view/499 (Accessed: 24 November 2024).