1. BARBIER EDWARD B et al., 1997. Economic Valuation of Wetlands[M]. Gland, Switzerland. 10–11.
2. CAI Shu-ming, ZHANG Xiao-yang, 1995. Study on wetland and its dynamic changes in Jianghan Plain using remote sensing [A]. In: Study of Wetland in China[C]. Changchun: Jilin Science and Technology Press, 177–181. (in Chineses)
3. LIU Xing-tu, 1997. Wetland resources and its sustainable use in Songnen-Sanjiang Plain[J]. Scientia Geographica Sinica, 17 (Supp.): 451–460. (in Chinese)
4. MITSCH W J, GOSSELINK J G, 1986. Wetland[M]. New York: Van Nostrand, 536.
5. SCOTT D, 1989. Directory of Asian Wetland[M]. Gland, Switzerland. IUCN Publication.