6Wu H, Wilhite D A. An operational agriculture drought risk assessment model for Nebraska, USA[J]. Natural Hazards, 2004, 33(1): 1-21.
7Fisher W D. On grouping for maximum homogeneity[J]. Journal of the American Statistical Association, 1958, 53: 789-798.
8Salhi S, Nagy G. Consistency and robustness in loca- tion routing[J]. Studies in Locational Analysis, 1999, 13:3 -19.
9Yi W, Ozdamar L. A dynamic logistics coordination model for evacuation and support in disaster response activities[J]. European Journal of Operational Re- search, 2007, 179(3): 1177-1193.
10Sun H L, Wang X Q, Xue Y F. A bi-level program ming model for a multi facility location-routing prob- lem in urban emergency system[J]. Lecture Notes in Electrical Engineering, 2011, 111: 75-80.
