@article{https://resolver.caltech.edu/CaltechAUTHORS:20170123-081714017,
    title = "Swarm-Keeping Strategies for Spacecraft Under J\_2 and Atmospheric Drag Perturbations",
    journal = "Journal of Guidance, Control, and Dynamics",
    year = "2012",
    url = "https://resolver.caltech.edu/CaltechAUTHORS:20170123-081714017",
    id = "record",
    issn = "0731-5090",
    doi = "10.2514/1.55705",
    volume = "35"
}