@article{https://resolver.caltech.edu/CaltechAUTHORS:20150902-132700847,
    title = "CCD photometry of the nuclei of three supergiant elliptical galaxies - Evidence for a supermassive object in the center of the radio galaxy NGC 6251",
    journal = "Astrophysical Journal",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20150902-132700847",
    id = "record",
    issn = "0004-637X",
    doi = "10.1086/157474",
    volume = "234"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:20150902-135159207,
    title = "Evidence for a supermassive object in the nucleus of the galaxy M87 from SIT and CCD area photometry",
    journal = "Astrophysical Journal",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20150902-135159207",
    id = "record",
    issn = "0004-637X",
    doi = "10.1086/156076",
    volume = "221"
}