Nhung, N. T. H., Thuy, N. T., Hien, N. V., & Manh, N. H. (2020). The process of preparation and analysis of calcareous nannofossil sample, and application for marine sediments of Soc Trang province. Vietnam Journal of Marine Science and Technology, 19(4), 537–544. https://doi.org/10.15625/1859-3097/19/4/12676