@article{https://resolver.caltech.edu/CaltechAUTHORS:WASpf02,
    title = "Effects of vertical vibration on hopper flows of granular material",
    journal = "Physics of Fluids",
    year = "2002",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:WASpf02",
    id = "record",
    issn = "1070-6631",
    doi = "10.1063/1.1503354",
    volume = "14"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:HUNpf99,
    title = "Effects of horizontal vibration on hopper flows of granular materials",
    journal = "Physics of Fluids",
    year = "1999",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:HUNpf99",
    id = "record",
    issn = "1070-6631",
    doi = "10.1063/1.869903",
    volume = "11"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:WASjam96,
    title = "Vertical Vibration of a Deep Bed of Granular Material in a Container",
    journal = "Journal of Applied Mechanics",
    year = "1996",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:WASjam96",
    id = "record",
    issn = "0021-8936",
    volume = "63"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:BREjam96,
    title = "Vertical Oscillation of a Bed of Granular Material",
    journal = "Journal of Applied Mechanics",
    year = "1996",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:BREjam96",
    id = "record",
    issn = "0021-8936",
    volume = "63"
}