@other{https://resolver.caltech.edu/CaltechAUTHORS:20151105-115204740,
    title = "Silica membranes for hydrogen separation in coal gas processing. Final report, January 1993",
    year = "1993",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20151105-115204740",
    id = "record"
}


@other{https://resolver.caltech.edu/CaltechAUTHORS:20151105-120142265,
    title = "Thermally induced structural changes in coal combustion. Final report",
    year = "1992",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20151105-120142265",
    id = "record",
    doi = "10.2172/10159795"
}