Torosaurus Is Not Triceratops: Ontogeny in Chasmosaurine Ceratopsids as a Case Study in Dinosaur Taxonomy Longrich, Nicholas R. ; Field, Daniel J. Abstract Publication: PLoS ONE Pub Date: February 2012 DOI: 10.1371/journal.pone.0032623 Bibcode: 2012PLoSO...732623L