Thermal-magnetic relation in a sunspot and a map of its Wilson depressionS. K. Mathew, S. K. Solanki, A. Lagg, M. Collados, J. M. Borrero and S. BerdyuginaA&A, 422 2 (2004) 693-701DOI: https://doi.org/10.1051/0004-6361:20040136
