A.W. Janssen. “Euthecosomatous Gastropods (Mollusca: Heterobranchia) from Buton (SE Sulawesi, Indonesia), With Notes on Species from Viti Levo, Fiji; Systematics, Biostratigraphy”. Netherlands Journal of Geosciences (January 1, 1999): 179- 189. Accessed April 5, 2026. https://njgjournal.nl/index.php/njg/article/view/12276.