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Germain, D.; Laurin, M. (2009). "Evolution of ossification sequences in salamanders and urodele origins assessed through event-pairing and new methods". Evolution & Development. 11 (2): 170–190. doi:10.1111/j.1525-142X.2009.00318.x. PMID19245549. S2CID22629275.
Bhullar, Bhart-Anjan S.; Morris, Zachary S.; Sefton, Elizabeth M.; et al. (2015-07-01). "A molecular mechanism for the origin of a key evolutionary innovation, the bird beak and palate, revealed by an integrative approach to major transitions in vertebrate history". Evolution. 69 (7): 1665–1677. doi:10.1111/evo.12684. PMID25964090. S2CID205124061.
Bout, Ron G.; Zweers, Gart A (2001). "The role of cranial kinesis in birds". Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 131 (1): 197–205. doi:10.1016/s1095-6433(01)00470-6. PMID11733177.
Richardson, Michael K.; Oelschlager, Helmut H. A. (2002). "Time, pattern, and heterochrony: a study of hyperphalangy in the dolphin embryo flipper". Evolution and Development. 4 (6): 435–444. doi:10.1046/j.1525-142X.2002.02032.x. PMID12492144. S2CID15429067.
Mitteroecker, P.; Gunz, P.; Bernhard, M.; Schaefer, K.; Bookstein, F. L. (June 2004). "Comparison of cranial ontogenetic trajectories among great apes and humans". J. Hum. Evol. 46 (6): 679–97. doi:10.1016/j.jhevol.2004.03.006. PMID15183670.
Penin, Xavier; Berge, Christine; Baylac, Michel (May 2002). "Ontogenetic study of the skull in modern humans and the common chimpanzees: neotenic hypothesis reconsidered with a tridimensional Procrustes analysis". American Journal of Physical Anthropology. 118 (1): 50–62. doi:10.1002/ajpa.10044. PMID11953945. S2CID15566858.
Zelditch, Miriam L.; Fink, William L. (2015). "Heterochrony and heterotopy: stability and innovation in the evolution of form". Paleobiology. 22 (2): 241–254. doi:10.1017/S0094837300016195. S2CID89098289.
Reilly, Stephen M. (February 1987). "Ontogeny of the hyobranchial apparatus in the salamanders Ambystoma talpoideum (Ambystomatidae) and Notophthalmus viridescens (Salamandridae): The ecological morphology of two neotenic strategies". Journal of Morphology. 191 (2): 205–214. doi:10.1002/jmor.1051910210. PMID29921111. S2CID49315190.
Germain, D.; Laurin, M. (2009). "Evolution of ossification sequences in salamanders and urodele origins assessed through event-pairing and new methods". Evolution & Development. 11 (2): 170–190. doi:10.1111/j.1525-142X.2009.00318.x. PMID19245549. S2CID22629275.
Bhullar, Bhart-Anjan S.; Morris, Zachary S.; Sefton, Elizabeth M.; et al. (2015-07-01). "A molecular mechanism for the origin of a key evolutionary innovation, the bird beak and palate, revealed by an integrative approach to major transitions in vertebrate history". Evolution. 69 (7): 1665–1677. doi:10.1111/evo.12684. PMID25964090. S2CID205124061.
Richardson, Michael K.; Oelschlager, Helmut H. A. (2002). "Time, pattern, and heterochrony: a study of hyperphalangy in the dolphin embryo flipper". Evolution and Development. 4 (6): 435–444. doi:10.1046/j.1525-142X.2002.02032.x. PMID12492144. S2CID15429067.
Penin, Xavier; Berge, Christine; Baylac, Michel (May 2002). "Ontogenetic study of the skull in modern humans and the common chimpanzees: neotenic hypothesis reconsidered with a tridimensional Procrustes analysis". American Journal of Physical Anthropology. 118 (1): 50–62. doi:10.1002/ajpa.10044. PMID11953945. S2CID15566858.
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