@ARTICLE{TreeBASE2Ref14912,
author = {Sydney A. Cameron},
title = {Multiple origins of advanced eusociality in bees inferred from mitochondrial DNA sequences.},
year = {1993},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
volume = {90},
number = {},
pages = {8687--8691},
abstract = {The remarkably high level...}
}