Emission of Extremely High Concentrations of PM2.5 and Ultrafine Particles during Firewood Combustion. Bhutan Journal of Research and Development, [S. l.], v. 8, n. 1, p. 73–86, 2019. Disponível em: https://www.bjrd.com.bt/index.php/bjrd/article/view/45. Acesso em: 17 jun. 2026.