153 MHz GMRT follow-up of steep-spectrum diffuse emission in galaxy clusters G. Macario, T. Venturi, H. T. Intema, D. Dallacasa, G. Brunetti, R. Cassano, S. Giacintucci, C. Ferrari, C. H. Ishwara-Chandra and R. Athreya A&A, 551 (2013) A141 Published online: 11 March 2013 DOI: 10.1051/0004-6361/201220667