TY  - RPRT
TI  - Surface waves in vertically vibrated granular materials.
AU  - HK Pak
AU  - RP Behringer
PY  - 1993
DO  - 10.1103/physrevlett.71.1832
UR  - https://pubmed.ncbi.nlm.nih.gov/10054511/
ID  - 10054511
ER  -