Wibowo , Heri Budi. “ PENGARUH GUGUS HIDROKSIL SEKUNDER TERHADAP SIFAT MEKANIK POLIURETAN BERBASIS HTPB (HYDROXY TERMINATED POLYBUTADIENE) (EFFECT OF SECONDARY HYDROXYL GROUPS ON MECHANICAL PROPERTIES OF POLYURETHANE BASE HTPB (HYDROXY TERMINATED POLYBUTADIENE))”. Indonesian Journal of Aerospace, vol. 13, no. 2 Desember, July 2025, pp. 103-11, https://ejournal.brin.go.id/ijoa/article/view/12380.