@article{https://resolver.caltech.edu/CaltechAUTHORS:GIUapl72,
    title = "Enhancement of self-focusing threshold in sapphire with elliptical beams",
    journal = "Applied Physics Letters",
    year = "1972",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:GIUapl72",
    id = "record",
    issn = "0003-6951",
    doi = "10.1063/1.1654278",
    volume = "21"
}


@article{https://resolver.caltech.edu/CaltechAUTHORS:20120809-133621098,
    title = "Self-focusing threshold of Gaussian-elliptic light beams",
    journal = "IEEE Journal of Quantum Electronics",
    year = "1972",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20120809-133621098",
    id = "record",
    issn = "0018-9197",
    doi = "10.1109/JQE.1972.1077170",
    volume = "8"
}