Saputra, Isnianto, Tulus Wibisono, and Avesta Y. Prasetya. 2021. “Middle Miocene Depositional Environment Shift in the Tarakan Basin: Some Perspectives from the Onshore Simenggaris Area”. Berita Sedimentologi 40 (1):45-54. https://doi.org/10.51835/bsed.2018.40.1.83.