Media type: E-Article Title: Formation of a penumbra in a decaying sunspot Contributor: Louis, R. E.; Mathew, S. K.; Puschmann, K. G.; Beck, C.; Balthasar, H. Published: EDP Sciences, 2013 Published in: Astronomy & Astrophysics, 552 (2013), Seite L7 Language: Not determined DOI: 10.1051/0004-6361/201321314 ISSN: 0004-6361; 1432-0746 Keywords: Space and Planetary Science ; Astronomy and Astrophysics Origination: Footnote: Access State: Open Access