@other{https://resolver.caltech.edu/CaltechAUTHORS:20190806-150227509,
    title = "The Digitized Second Palomar Observatory Sky Survey (DPOSS) II: Photometric Calibration",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20190806-150227509",
    id = "record",
    doi = "10.48550/arXiv.0210298"
}