N. K. Vân, Đỗ L. Thủy and T. A. Đức, Causes and occurring frequency of heavy rain, “unusual heavy rain” in the area from Hai Van Pass to Ca Pass, South - Central Region of Vietnam (period 1986 - 2010), Vietnam J. Earth Sci. 35 (2014) 163–174. DOI: https://doi.org/10.15625/0866-7187/35/2/3661.