Air-filled postcranial bones in theropod dinosaurs: physiological implications and the 'reptile'–bird transitionDOI: info:10.1111/j.1469-185X.2011.00190.xv. 87No. 1168–193
Benson, Roger B. J., Butler, Richard J., Carrano, Matthew T., and O'Connor, Patrick M. 2012. "Air-filled postcranial bones in theropod dinosaurs: physiological implications and the 'reptile'–bird transition." Biological Reviews, 87, (1) 168–193. https://doi.org/10.1111/j.1469-185X.2011.00190.x.