- Received 21 January 2004 Accepted 9 March 2004
- Curriculum Vitae --Leon Claessens --May 31, 2010 Leon Philip Antonius Maria CLAESSENS
- Journal of Vertebrate Paleontology 24(1):89106, March 2004 2004 by the Society of Vertebrate Paleontology
- AVES 3D: A NEW ONLINE RESOURCE FOR AVIAN SKELETAL ANATOMY Leon CLAESSENS, Scott EDWARDS, Rachael MARTINEZ, Mike KRZYZAK, Mark ECKARDT, Greg LESLIE, Mike MARCUCCI, Scott NEABORE, Ivan VRCEK, Sam MOSS, Kevin GRASSI
- Respiratory Evolution Facilitated the Origin of Pterosaur Flight and Aerial Gigantism
- Curriculum Vitae --Leon Claessens --2011 Leon Philip Antonius Maria CLAESSENS
