Fassett, J.E.; Heaman, L.M.; Simonetti, A. (2011). "Direct U–Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico". Geology. 39 (2): 159–162. Bibcode:2011Geo....39..159F. doi:10.1130/G31466.1. ISSN0091-7613.
Case, Judd A.; Martin, James E.; Chaney, Dan S.; Regurero, Marcelo; Marenssi, Sergio A.; Santillana, Sergio M.; Woodburne, Michael O. (25 September 2000). "The first duck-billed dinosaur (family Hadrosauridae) from Antarctica". Journal of Vertebrate Paleontology. 20 (3): 612–614. doi:10.1671/0272-4634(2000)020[0612:tfdbdf]2.0.co;2. JSTOR4524132.
Fassett, J.E.; Heaman, L.M.; Simonetti, A. (2011). "Direct U–Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico". Geology. 39 (2): 159–162. Bibcode:2011Geo....39..159F. doi:10.1130/G31466.1. ISSN0091-7613.
jstor.org
Case, Judd A.; Martin, James E.; Chaney, Dan S.; Regurero, Marcelo; Marenssi, Sergio A.; Santillana, Sergio M.; Woodburne, Michael O. (25 September 2000). "The first duck-billed dinosaur (family Hadrosauridae) from Antarctica". Journal of Vertebrate Paleontology. 20 (3): 612–614. doi:10.1671/0272-4634(2000)020[0612:tfdbdf]2.0.co;2. JSTOR4524132.
Fassett, J.E.; Heaman, L.M.; Simonetti, A. (2011). "Direct U–Pb dating of Cretaceous and Paleocene dinosaur bones, San Juan Basin, New Mexico". Geology. 39 (2): 159–162. Bibcode:2011Geo....39..159F. doi:10.1130/G31466.1. ISSN0091-7613.