Acoustic Bessel-like beam formation by an axisymmetric grating N. Jiménez, V. Romero-García, R. Picó, A. Cebrecos, V. J. Sánchez-Morcillo, L. M. Garcia-Raffi, J. V. Sánchez-Pérez and K. Staliunas EPL, 106 2 (2014) 24005 Published online: 30 April 2014 DOI: 10.1209/0295-5075/106/24005