Zacchei, A., Maino, D., Baccigalupi, C., Bersanelli, M., Bonaldi, A., Bonavera, L., et al. (2011). Planck early results - V. The Low Frequency Instrument data processing. Astronomy & Astrophysics, 536: A5, pp. 1-19. doi:10.1051/0004-6361/201116484.