NUSYIRWAN, Nusyirwan; FIKRI, Hayatul. Study on the Flexural Strength of Polyester Composite Beams and Coconut Husk Charcoal Powder. Jurnal Teknik Mesin (Journal Of Mechanical Engineering), Jakarta, Indonesia, v. 15, n. 01, p. 83–89, 2026. DOI: 10.22441/jtm.v15i01.23591. Disponível em: https://publikasi.mercubuana.ac.id/index.php/jtm/article/view/23591. Acesso em: 3 jun. 2026.