TY - GEN T1 - A Proof that Multiple Waves Propagate in Ensemble-Averaged Particulate Materials T2 - arXiv PY - 2019/05/16 AU - Gower AL AU - Abrahams ID AU - Parnell WJ ED - DO - DOI: 10.48550/arxiv.1905.06996 Y2 - 2024/10/23 ER -