Khairunnisa, Eka, and Fitria Suryaningsih. “Development and Implementation of Android-Based Interactive E-Modules to Improve Mathematical Problem-Solving Skills at Secondary Schools Hamid Khan Pulau Pinang Malaysia”. Journal of Science and Mathematics Education, vol. 1, no. 3, Sept. 2025, pp. 61-67, doi:10.70716/josme.v1i3.238.