Hadiwijaya, Syarif, Ferly Norman, and Fergyanto E. Gunawan. “Analyzing the Impact of the Covid-19 Pandemic on the Indonesian Briquette Industry Performance”. International Journal on Advanced Science, Engineering and Information Technology 11, no. 5 (October 25, 2021): 2082–2088. Accessed July 3, 2024. https://ijaseit.insightsociety.org/index.php/ijaseit/article/view/13874.