Large closed-field corona of WX Ursae Majoris evidenced from radio observations I. Davis, H. K. Vedantham, J. R. Callingham, T. W. Shimwell, A. A. Vidotto, P. Zarka, T. P. Ray and A. Drabent A&A, 650 (2021) L20 Published online: 30 June 2021 DOI: 10.1051/0004-6361/202140772