Peter R Crane

Potomacanthus lobatus gen. et sp. nov., a new flower of probable Lauraceae from the Early Cretaceous (Early to Middle Albian) of eastern North America.

Marco Stampanoni, M. Stampanoni, E. M. Friis, 2007, American journal of botany.

Rate heterogeneity among lineages of tracheophytes: Integration of molecular and fossil data and evidence for molecular living fossils

Pamela S Soltis, Douglas E Soltis, Vincent Savolainen, 2002, Proceedings of the National Academy of Sciences of the United States of America.