Determination of Copper, Manganese, Nickel and Zinc in Different Cigarette Brands Available in Pakistan: Determination of Metals in Different Cigarettes. Biological Sciences - PJSIR, [S. l.], v. 52, n. 6, p. 307–311, 2009. Disponível em: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/573. Acesso em: 10 mar. 2026.