@other{https://resolver.caltech.edu/CaltechTHESIS:07182014-141717487,
    title = "Optical properties of excited silicon and germanium at low temperatures  ",
    url = "https://resolver.caltech.edu/CaltechTHESIS:07182014-141717487",
    id = "record",
    doi = "10.7907/8gcb-7j35"
}