@other{https://resolver.caltech.edu/CaltechTHESIS:12042014-104112714,
    title = "Discrete Modeling of Granular Media: A NURBS-based Approach",
    url = "https://resolver.caltech.edu/CaltechTHESIS:12042014-104112714",
    id = "record",
    doi = "10.7907/Z9W093V4"
}