@other{https://resolver.caltech.edu/CaltechETD:etd-10252007-112314,
    title = "Problems in nonlinear diffusion",
    year = "1995",
    url = "https://resolver.caltech.edu/CaltechETD:etd-10252007-112314",
    id = "record",
    doi = "10.7907/SC6N-KK20"
}