Shyu, Jih-Ping; Müller, Carla (1991): Calcareous nannofossil biostratigraphy of the Celebes and Sulu Seas. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 133-157, doi:10.2973/odp.proc.sr.124.127.1991