@inbook{https://resolver.caltech.edu/CaltechAUTHORS:HUNmdfpm97,
    title = "Mechanics of deformation and flow of particulate materials : proceedings of a symposium, Evanston, Illinois, June 29-July 2, 1997",
    chapter = "Effects of Horizontal Vibration on Hopper Flows of Granular Material",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:HUNmdfpm97",
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    isbn = "0784402515"
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@inbook{https://resolver.caltech.edu/CaltechAUTHORS:WASmdfpm97,
    title = "Mechanics of deformation and flow of particulate materials : proceedings of a symposium, Evanston, Illinois, June 29-July 2, 1997",
    chapter = "Effects of vertical vibration on hopper flows of granular material",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:WASmdfpm97",
    id = "record",
    isbn = "0784402515"
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@inbook{https://resolver.caltech.edu/CaltechAUTHORS:WASpg97,
    title = "Powders \& grains 97 : proceedings of the third International Conference on Powders \& Grains, Durham, North Carolina, 18-23 May 1997",
    chapter = "Investigation of f/2 and f/4 Waves in Granular Beds Subject to Vertical, Sinusoidal Oscillations",
    year = "1997",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:WASpg97",
    id = "record",
    isbn = "9054108843"
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    title = "ASCE Engineering Mechanics Conference (10th : 1995 : University of Colorado, Boulder)",
    chapter = "Granular Flow in a Vertically Vibrating Hopper",
    year = "1995",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:WASasceemc95",
    id = "record",
    isbn = "0784400830"
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@inbook{https://resolver.caltech.edu/CaltechAUTHORS:BREpg93,
    title = "Powders \& grains 93 : proceedings of the Second International Conference on Micromechanics of Granular Media, Birmingham, UK, 12-16 July 1993",
    chapter = "Vertical oscillation of a bed of granular material",
    year = "1993",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:BREpg93",
    id = "record",
    isbn = "905410323X"
}