"The Milky Way as a galaxy" (Ivan King, Gerald Gilmore, Pieter C. van
der Kruit.Está en la biblioteca de la Facultad de Matemáticas)

"Galaxies in the Universe:an Introduction" (Linda Sparke,John S.
Gallagher III) (en la biblioteca de investigador de la facultad de
matemáticas)

http://articles.adsabs.harvard.edu//full/proc/immm./2000//0000004.000.html

http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?2000immm.proc...69\
H

http://articles.adsabs.harvard.edu//full/seri/A%2BA../0338//L000033.000.html

http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1999A%26A...351..4\
47P

http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1994AJ....108.1667\
D

http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1991PASP..103.1053\
V

http://www.seds.org/messier/m/m031.htm

http://www.seds.org/~spider/spider/LG/m031.html

http://nedwww.ipac.caltech.edu

etc.