N. Thi Kieu Duyen, H. Le Thanh Nguyen, N. Thi Thu Trang, L. My Loan Phung, and T. Van Man, “Investigation of structure and electrochemical properties of layered structure NaFexMn1-xO2”, Science & Technology Development Journal: Natural Sciences, vol. 3, no. 4, pp. 317-325, Apr. 2020.