TY - JOUR T1 - A proof that multiple waves propagate in ensemble-averaged particulate materials JO - Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences UR - https://eprints.whiterose.ac.uk/id/eprint/147113 PY - 2019/09/01 AU - Gower AL AU - Abrahams ID AU - Parnell WJ ED - DO - DOI: 10.1098/rspa.2019.0344 PB - The Royal Society VL - 475 IS - 2229 Y2 - 2025/12/03 ER -