Marquez, I.; Durret, F.; Delgado, R. M. Gonzalez; Marrero, I.; Masegosa, J.; Maza, J.; Moles, M.; Perez, E.; Roth, M. (1999-09-21). "Near-infrared photometry of isolated spirals with and without an AGN". Astronomy and Astrophysics Supplement Series. 140: 1–14. arXiv:astro-ph/9909351. doi:10.1051/aas:1999516.
Marquez, I.; Durret, F.; Delgado, R. M. Gonzalez; Marrero, I.; Masegosa, J.; Maza, J.; Moles, M.; Perez, E.; Roth, M. (1999-09-21). "Near-infrared photometry of isolated spirals with and without an AGN". Astronomy and Astrophysics Supplement Series. 140: 1–14. arXiv:astro-ph/9909351. doi:10.1051/aas:1999516.