Development of E-Learning, Mobile Apps, Character Building, and Outdoor Study (EMCO Learning Model) to Improve Geography Outcomes in the 21st Century. - Hendri Prastiyono; Sugeng Utaya; Sumarmi Sumarmi; I Komang Astina; Saiful Amin; Muhammad Aliman (Int. J. Interact. Mob. Technol., 2021)

Development of Geomobile App-Based Outdoor Study to Improve Critical-Social Abilities and Collaborative in the 21st Century. - Hendri Prastiyono; Bambang Sigit Widodo; Sugeng Utaya; Sumarmi; I Komang Astina; Saiful Amin; Pedro T. Isaías (Int. J. Interact. Mob. Technol., 2023)