The size of dinosaurs have been annalyzed following different criteria. Herein, we can see different papers...
http://www.biomedcentral.com/1741-7007/10/60
http://www.biomedcentral.com/1741-7007/10/60
http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1001853
http://www.miketaylor.org.uk/tmp/papers/Mazzetta-et-al_04_SA-dino-body-size.pdf
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0141794
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4555864/
Apatosaurus (after Burian, 1950)