Determination of the optimal set of frequency bands for the PLANCK CMBR satellite missionM. J.D. Linden-Vørnle and H. U. Nørgaard-NielsenAstron. Astrophys. Suppl. Ser., 128 2 (1998) 377-387DOI: https://doi.org/10.1051/aas:1998100