Contains the keyword 341

Ballengée B, Sessions SK. Explanation for missing limbs in deformed amphibians. Journal of experimental zoology Part B, Molecular and developmental evolution. 2009;312:770-9. Abstract
Bininda-Emonds OR, Jeffery JE, Sánchez-Villagra MR, Hanken J, Colbert M, Pieau C, et al. Forelimb-hindlimb developmental timing changes across tetrapod phylogeny. BMC Evolutionary Biology. 2007;7:182. Abstract