CCD imaging and aperture polarimetry of comet 2P/Encke: are there two polarimetric classes of comets?K. Jockers, N. Kiselev, T. Bonev, V. Rosenbush, N. Shakhovskoy, S. Kolesnikov, Yu. Efimov, D. Shakhovskoy and K. AntonyukA&A, 441 2 (2005) 773-782DOI: https://doi.org/10.1051/0004-6361:20053348
