Szokoly, Gyula P. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Finkbeiner, D. P., Padmanabhan, N., Schlegel, D. J., Carr, M. A., Gunn, J. E., Rockosi, C. M., et al. (2004). Sloan digital sky survey imaging of low galactic latitude fields: technical summary and data release. The Astronomical Journal, 128(5), 2577-2592.