Instabilities in vertically vibrated fluid-grain systemsP. J. King, P. Lopez-Alcaraz, H. A. Pacheco-Martinez, C. P. Clement, A. J. Smith and M. R. SwiftEur. Phys. J. E, 22 3 (2007) 219-226DOI: https://doi.org/10.1140/epje/e2007-00001-6