@MISC{BeOlSc2011,
    author = "Bell, W. N. and Olson, L. N. and Schroder, J. B.",
    title = "{PyAMG}: Algebraic Multigrid Solvers in {Python} v2.0",
    year = "2011",
    url = "http://www.pyamg.org",
    note = "Release 2.0"
}
