Bibliografia

Principal

• Sparke, L.S. Gallagher, J.S. (2007) Galaxies in the Universe, 2nd ed. Cambridge University Press
• Binney J., Merrifield M. (1998) Galactic Astronomy Princeton University Press

Secundária

• Binney J., Tremaine S (2008) Galactic Dynamics, 2nd ed. Princeton University Press,
• Carroll, B. W., Ostlie, D. A. (2014) An Introduction to Modern Astrophysics, 2nd ed. Pearson Education Limited