Thuan, Dinh, Thi Dao, Ngo, Tan, Mai Thanh, Duc Luong, Le, Thanh Ha, Trinh, AND Tao, Nguyen. " Biostratigraphical characteristics of Late Miocene coaly sediments in the Southeastern Red River Delta" VNU Journal of Science: Earth and Environmental Sciences [Online], Volume 35 Number 2 (30 June 2019)