Eder W,"Unesco Geoparks"-A new initiative for protection and ssutainable development of the Earth\'s heritage,Neues Jahrbuch für Geologie und Paleontologie Abhandlungen,1999.
[2]
Ji Shu\'an;Pan Jiang,The geological heritage sites and national parks in China,Engineering Geology and the Environment Mannos Kkis Balkema,1997.