B. F. . Achmad, A. S. . Fitriawan, D. . Kurniawan, R. F. Kafil, L. N. Retnaningsih, and W. A. W. Setyaningsih, “Perceived Barriers in Online Learning among Nursing Students during the COVID-19 Pandemic in Indonesia”, Open Access Maced J Med Sci, vol. 9, no. G, pp. 203–210, Oct. 2021.