Le Diem Bui, L., Gi Kim, Y., Won Ho, W., Tthi Thu Ho, H., Tinh Tran, T., Phuong Hoang, Y., & Le Diem Trang, B. (2018). The building OER in okmindmap for innovative teaching and learning. International Journal of Engineering & Technology, 7(4.9), 26-31. https://doi.org/10.14419/ijet.v7i4.9.20610