Polarimetry of sunspot penumbrae with high spatial resolutionN. Bello González, O. V. Okunev, I. Domínguez Cerdeña, F. Kneer and K. G. PuschmannA&A, 434 1 (2005) 317-327DOI: https://doi.org/10.1051/0004-6361:20042001
