Dinh Trong Cao, Van Dung Le, Anh Tuan Thai, Thanh Hai Dang and Dinh Trieu Cao 2019. The characteristics of seismic activity in the ladder zone of Da river hydro-electric plants. Vietnam Journal of Science, Technology and Engineering. 61, 1 (Mar. 2019), 82-91. DOI:https://doi.org/10.31276/VJSTE.61(1).82-91.