Proportionality: A Valid Alternative to Correlation for Relative Data Lovell, David ; Pawlowsky-Glahn, Vera ; Egozcue, Juan José ; Marguerat, Samuel ; Bähler, Jürg Abstract Publication: PLoS Computational Biology Pub Date: March 2015 DOI: 10.1371/journal.pcbi.1004075 Bibcode: 2015PLSCB..11E4075L