Collaboration, Planck, P. A. R. Ade, N. Aghanim, H. D. Aller, M. F. Aller, M. Arnaud, J. Aumont, et al. (2016) 2016. “Planck Intermediate Results. XLV. Radio Spectra of Northern Extragalactic Radio Sources”. \aap 596: A106. doi:10.1051/0004-6361/201527780.