Меловой период

Rojas A., Patarroyo P., Mao L., Bengtson P., Kowalewski M. (2017) Global biogeography of Albian ammonoids: A network-based approach // Geology, v. 45, p. 659-662, First published on May 8, 2017, doi:10.1130/G38944.
http://geology.geoscienceworld.org/cont ... /659?etoc=
(open access)