Hoang, T. V., A. Wysocka, C. Q. Nguyen, P. D. Pha, and P. Ziółkowski. “Sedimentary Petrology Characteristics and Their Implications for Provenance of Hoanh Bo Basin Neogene System in Quang Ninh Province, North-Eastern Vietnam”. Geology, Geophysics and Environment, vol. 43, no. 1, July 2017, p. 69, doi:10.7494/geol.2017.43.1.69.