@book {39,
	title = {Bellmann H. 2011. Himen{\'o}pteros. En: Nueva gu{\'\i}a de campo de insectos. 312-314. Ediciones Omega. Barcelona (Espa{\~n}a).},
	series = {Bellmann H. 2011. Himen{\'o}pteros. En: Nueva gu{\'\i}a de campo de insectos. 312-314. Ediciones Omega. Barcelona (Espa{\~n}a).},
	year = {2011},
	edition = {Omega},
	author = {Bellmann H.}
}
@book {38,
	title = {FAUNA IB{\'E}RICA Vol.23 HYMENOPTERA-APOIDEA I},
	series = {Ornosa Gallego C. and Ortiz-S{\'a}nchez F. J. 2004. Subfamilia Bombinae. En: Fauna Ib{\'e}rica. Volumen 23. Hymenoptera: Apoidea I. . CSIC. Madrid (Espa{\~n}a).},
	volume = {23},
	number = {FAUNA IB{\'E}RICA},
	year = {2004},
	pages = {556},
	url = {http://www.fauna-iberica.mncn.csic.es/publicaciones/fi23.php},
	author = {Concepci{\'o}n Ornosa Gallego and Francisco Javier Ortiz-S{\'a}nchez}
}
@article {35,
	title = {Phylogeny of Bombus},
	journal = {￼￼￼￼￼￼￼￼￼￼SCIENCE DIRECT},
	year = {2003},
	abstract = {<p>Phylogeny, historical biogeography, and character evolution<br />
	in bumble bees (Bombus: Apidae) based on simultaneous analysis of three nuclear gene sequences</p>
},
	keywords = {Bombus, DNA, length, proboscis, sequence},
	doi = {Smithsonian Tropical Research Institute (Panama).},
	url = {http://stri.si.edu/sites/publications/PDFs/Roubik_Bumblebee\%20tree.pdf},
	author = {Atsushi Kawakita and Teiji Sota and Masao Ito and John S. Ascher and Hiroyuki Tanaka and Makoto Kato and David W. Roubik}
}
