Phuangkhansai, S., P. Phonepaseuth, V. Mangnomek, O. Phearkeo, and L. Junthavexaiy. “Efficiency of Charcoal Briquettes Produce from Waste Bamboo Sticks at Buffet Restaurants in Xaythany District, Vientiane Capital”. Souphanouvong University Journal Multidisciplinary Research and Development, vol. 7, no. 2, Dec. 2021, pp. 217-28, http://www.su-journal.com/index.php/su/article/view/137.