Indupurnahayu, I., Setiawan, E.B., Agusinta, L., Suryawan, R.F., Ricardianto, P., Sari, M., Mulyono, S. and Sakti, R.F.J. 2021. Changes in Demand and Supply of the Crude Oil Market During the COVID-19 Pandemic and its Effects on the Natural Gas Market. International Journal of Energy Economics and Policy. 11, 3 (Apr. 2021), 1–6.