@other{https://resolver.caltech.edu/CaltechETD:etd-09062005-102553,
    title = "Perturbations of One-Dimensional Schrödinger Operators Preserving the Absolutely Continuous Spectrum",
    year = "2001",
    url = "https://resolver.caltech.edu/CaltechETD:etd-09062005-102553",
    id = "record",
    doi = "10.7907/2t54-0b07"
}


@other{https://resolver.caltech.edu/CaltechTHESIS:06052013-085416894,
    title = "Ghosts of Order on the Frontier of Chaos",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechTHESIS:06052013-085416894",
    id = "record",
    doi = "10.7907/rhdh-py47"
}


@other{https://resolver.caltech.edu/CaltechETD:etd-08172005-161212,
    title = "Spectral Gaps from Ordered to Disordered Systems",
    year = "1989",
    url = "https://resolver.caltech.edu/CaltechETD:etd-08172005-161212",
    id = "record",
    doi = "10.7907/gv0b-re42"
}