Mennella, A., Bersanelli, M., Butler, R. C., Curto, A., Cuttaia, F., Davis, R. J., et al. (2011). Planck early results - III. First assessment of the Low Frequency Instrument in-flight performance. Astronomy & Astrophysics, 536: A3, pp. 1-29. doi:10.1051/0004-6361/201116480.