Twisting flux tubes as a cause of micro-flaring activity D. B. Jess, R. T. J. McAteer, M. Mathioudakis, F. P. Keenan, A. Andic and D. S. Bloomfield A&A, 476 2 (2007) 971-977 Published online: 24 September 2007 DOI: 10.1051/0004-6361:20077916