Hill M O.- TWINSPAN- A FORTRAN Program for Arranging Multi variate Data in an ordered two- way Table by Classification of the Indi viduals and Attributes. Cornell University, Ithaca N.Y. 1979b.
[4]
Braak C J F.CANOCO- a Fortran program for anonical community or dination.Agriculture Mathematics Group,Wageningen,1988.
[5]
Zhang J- T. A combination of fuzzy set ordination with detrended cor respondence analysis[J]. Vegetatio,1994, 115: 115- 121.
