@other{https://resolver.caltech.edu/CaltechTHESIS:05252015-121408938,
    title = "Toppling Analysis of Precariously Balanced Rocks under Earthquake Excitation",
    url = "https://resolver.caltech.edu/CaltechTHESIS:05252015-121408938",
    id = "record",
    doi = "10.7907/Z98W3B9Z"
}