Cao, Bao Lam, et al. “DARK SOIL PITS AND GRAVES IN VOLCANIC CAVE C6.1, KRONG NO, DAK NONG PROVINCE: DOCUMENTATION AND DISCUSSION”. Dalat University Journal of Science, vol. 13, no. 4, Dec. 2023, pp. 82-98, https://doi.org/10.37569/DalatUniversity.13.4.1185(2023).