SUSANTO, Edi et al. Influences of the Operating Variables of Formic Acid Pulping on Pulp Properties of Perimping Grass. International Journal of Environmental Research & Clean Energy, [S.l.], v. 12, n. 1, p. 1-6, nov. 2018. ISSN 2502-3888. Available at: <https://www.isomase.org/Journals/index.php/ijerce/article/view/76>. Date accessed: 18 feb. 2026.