@article{https://resolver.caltech.edu/CaltechAUTHORS:20150511-114212628,
    title = "The Random Packing of Circles in a Plane",
    journal = "Journal of Colloid and Interface Science",
    year = "1971",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20150511-114212628",
    id = "record",
    issn = "0021-9797",
    doi = "10.1016/0021-9797(71)90338-9",
    volume = "37"
}


@other{https://resolver.caltech.edu/CaltechAUTHORS:20151113-163603588,
    title = "A Research Program on Solid Propellant Physical Behavior",
    year = "1968",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20151113-163603588",
    id = "record"
}