R. M. B. Kmurawak, S. A. Mandowen, I. S. Beno, P. D. Lokollo, and H. Tobing, “Measuring the E-learning Readiness Level in Rural Areas During the Covid-19 Pandemic”, J. Educ. Technol., vol. 6, no. 3, pp. 459–466, Aug. 2022.