Đông, B.V., Phương, T.H. and Dương, N.T. 2014. Origin and name of “conglomerate” formation on the top of the Ba Vi moutain. Vietnam Journal of Earth Sciences. 35, 3 (Feb. 2014), 204–210. DOI:https://doi.org/10.15625/0866-7187/35/3/3680.