Pronounced pionic self-similarity in ring-like events in 16O-AgBr interactions Dipak Ghosh, Argha Deb, Prabir Kumar Haldar and Aparna Dhar(Mitra) EPL, 80 2 (2007) 22003 Published online: 24 September 2007 DOI: 10.1209/0295-5075/80/22003