Nguyen Q-T, Diaz JF, Chen J-H, Lee M-Y. Fractional Integration in Corporate Social Responsibility Indices: A FIGARCH and HYGARCH Approach. 5002 [Internet]. 2019 Jul. 24 [cited 2024 May 16];9(7):836-50. Available from: http://archive.aessweb.com/index.php/5002/article/view/1841