Fathimahhayati, Lina Dianati, et al. “Analisis Ergonomi Pada Perkuliahan Daring Menggunakan Smartphone Selama Masa Pandemi Covid-19: Studi Kasus Mahasiswa Prodi Teknik Industri Universitas Mulawarman”. Operations Excellence: Journal of Applied Industrial Engineering, vol. 12, no. 3, Nov. 2020, pp. 308-17, doi:10.22441/oe.2020.v12.i3.004.