Rota-Stabelli, Omar; Daley, Allison C. ; Pisani, Davide. "Molecular Timetrees Reveal a Cambrian Colonization of Land and a New Scenario for Ecdysozoan Evolution" Current Biology, Volume 23, Issue 5 (31 January, 2013)| https://doi.org/10.1016/j.cub.2013.01.026