1. Singh R. M., “History of Bio Briquetting,” 2008 [Online] From https://web.archive.org/web/20100714000840/http://www.bgrcnn.net/documents/History%20of%20Bio%20Briquetting.doc (2008) [Acessed on September 30, 2022]
2. Zahnen J., Hirschberger P., Haag V., and Lewandrowski T.L.. 2020 Analysis of The EU Charcoal Market. Berlin: WWF Germany (2020) https://www.openagrar.de/receive/openagrar_mods_00066143.
3. Kementrian Luar Negeri Republik Indonesia [Ministry of Foreign Affairs of the Republic of Indonesia], Arang Batok Kelapa Indonesia yang Kualitasnya Mendunia [Indonesian Coconut Shell Charcoal with Global Quality], [Online] from https://kemlu.go.id/maputo/id/news/13455/arang-batok-kelapa-indonesia-yang-kualitasnya-mendunia (2018). [Accessed Sep 20th 2022] [in Bahasa Indonesia]
4. The Technical Design Concept of Hi-Tech Cook Stove for Urban Communities using Non-Wood Agricultural Waste as Fuel Sources