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Simplicially Constrained Regression Models for Proportions. The constraint is always that the betas are non-negative and sum to 1.
Michail Tsagris mtsagris@uoc.gr
Michail Tsagris <mtsagris@uoc.gr>.
Iverson Sara J., Field Chris, Bowen W. Don and Blanchard Wade (2004) Quantitative Fatty Acid Signature Analysis: A New Method of Estimating Predator Diets. Ecological Monographs, 74(2): 211-235.