Experimental stabilisation of 2D vortex patterns using time-dependent forcing M. Lauret, L. P. J. Kamp, G. J. F. van Heijst, M. R. de Baar and H. Nijmeijer EPL, 104 2 (2013) 24003 Published online: 20 November 2013 DOI: 10.1209/0295-5075/104/24003