Origin of Metazoan Developmental Toolkits and Their Expression in the Fossil RecordDOI: info:10.1007/978-94-017-9642-2_3v. 2Springer Netherlands47–77
Tweedt, Sarah M. and Erwin, Douglas H. 2015. "Origin of Metazoan Developmental Toolkits and Their Expression in the Fossil Record." In Evolutionary Transitions to Multicellular Life. Ruiz-Trillo, Iñaki and Nedelcu, Aurora M., editors. 47–77. Dordrecht: Springer Netherlands. 2 in Advances in Marine Genomics. https://doi.org/10.1007/978-94-017-9642-2_3.