@article {4431,
title = {Phylogenetic relationships of African green snakes (genera Philothamnus and Hapsidophrys) from S{\~a}o Tom{\'e}, Pr{\'\i}ncipe and Annobon islands based on mtDNA sequences and comments on their colonization and taxonomy},
journal = {Herpetological Journal},
volume = {19},
year = {2009},
pages = {41 - 48},
author = {Jesus, J. and Nagy, Zolt{\'a}n T. and Branch, W. and Wink, M. and Brehm, A. and Harris, J.}
}