Sturm, R., Drašković, D., Filipović, M. D., Haberl, F., Collier, J., Crawford, E. J., et al. (2013). Active galactic nuclei behind the SMC selected from radio and X-ray surveys. Astronomy & Astrophysics, 558: A101, pp. 1-9. doi:10.1051/0004-6361/201220564.