Ter Braak, C.J.F. <br/><br/>
Ecological amplitudes of plant species and the internal consistency of Ellenberg's indicator values for moisture 
Cajo J.F Ter Braak and J.M. Gremmen 
<br/><br/><label>Subjects--Index Terms: </label>Amplitude, Gaussian logit curve, Indicator value, Logit regression, Maxiumum likelihood, Optimum, Tolerance, Unimodal response curve, Weighted averaging