5GRAYBILL J K, DOOLING S, SHANDAS V,et al. A rough guide to interdisciplinarity: graduate student perspectives[J] . Bioscience,2006,56(9).
6MARZLUFF J M, NERAD M, BRADLEY G, et al. Creating and sustaining a culture of interdisciplinarity : novel approaches to graduate education in the environmental sciences [EB/OL]. http://depts.washington.edu/cirgeweb/c/publications-presentations/by_title/.
7Introduction to the IGERT program[EB/OL].http://www.nsf. gov/crssprgm/igert/intro.jsp.
8HEG D, NERAD M. Innovation in PhD training: the urban ecology IGERT at the University of Washington mid-term program evaluation [EB/OL]. http://depts.washington .edu/ cirgeweb/c/research/innovative-programs-igerts/.