Hong Dien, L., N. Phuc Son, P. Hoang Uyen, and L. Van Hinh. “On a Segmentation of Coopextra Customers in Thu Duc District”. Science & Technology Development Journal: Economics- Law & Management, Vol. 3, no. 1, May 2019, pp. 28-36, doi:https://doi.org/10.32508/stdjelm.v3i1.537.