RATAN-600 multi-frequency data for the BL Lacertae objectsM. G. Mingaliev, Yu. V. Sotnikova, R. Yu. Udovitskiy, T. V. Mufakharov, E. Nieppola and A. K. ErkenovA&A, 572 (2014) A59DOI: https://doi.org/10.1051/0004-6361/201424437