Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Todd Wellnitz and N. LeRoy Poff,Functional redundancy in heterogeneous environments: implications for conservation,Ecology Letters,1461-023X,Wiley,2001-05-30,4,3,177-179,https://cir.nii.ac.jp/crid/1364233270288295808,https://doi.org/10.1046/j.1461-0248.2001.00221.x