Unwin, David M.; Martill, David M. (December 2020). “No protofeathers on pterosaurs”. Nature Ecology & Evolution4 (12): 1590–1591. doi:10.1038/s41559-020-01308-9. PMID32989266.
Unwin, David M.; Bakhurina, Natasha N. (September 1994). “Sordes pilosus and the nature of the pterosaur flight apparatus”. Nature371 (6492): 62–64. Bibcode: 1994Natur.371...62U. doi:10.1038/371062a0.
Yang, Zixiao; Jiang, Baoyu; McNamara, Maria E.; Kearns, Stuart L.; Pittman, Michael; Kaye, Thomas G.; Orr, Patrick J.; Xu, Xing et al. (December 2020). “Reply to: No protofeathers on pterosaurs”. Nature Ecology & Evolution4 (12): 1592–1593. doi:10.1038/s41559-020-01309-8. PMID32989267.
Andres, Brian; Clark, James M.; Xing, Xu (2010). “A new rhamphorhynchid pterosaur from the Upper Jurassic of Xinjiang, China, and the phylogenetic relationships of basal pterosaurs”. Journal of Vertebrate Paleontology30 (1): 163–187. doi:10.1080/02724630903409220.
Unwin, David M.; Bakhurina, Natasha N. (September 1994). “Sordes pilosus and the nature of the pterosaur flight apparatus”. Nature371 (6492): 62–64. Bibcode: 1994Natur.371...62U. doi:10.1038/371062a0.
Unwin, David M.; Martill, David M. (December 2020). “No protofeathers on pterosaurs”. Nature Ecology & Evolution4 (12): 1590–1591. doi:10.1038/s41559-020-01308-9. PMID32989266.
Yang, Zixiao; Jiang, Baoyu; McNamara, Maria E.; Kearns, Stuart L.; Pittman, Michael; Kaye, Thomas G.; Orr, Patrick J.; Xu, Xing et al. (December 2020). “Reply to: No protofeathers on pterosaurs”. Nature Ecology & Evolution4 (12): 1592–1593. doi:10.1038/s41559-020-01309-8. PMID32989267.