tsai, Y., K. wang, Y. chen, and C. shieh. “The Variability in Time of the Occurrence Conditions of Debris Flow After Catastrophic Typhoons and Earthquakes: A Theoretical Explanation With Experimental Tests”. Italian Journal of Engineering Geology and Environment, Nov. 2011, pp. 143-8, doi:10.4408/IJEGE.2011-03.B-017.