@mastersthesis{
    ProGradu,
    author = "Korpi, Maarit J.",
    flags = "copy",
    school = "University of Oulu",
    address = "Oulu, Finland",
    year = "1996",
    title = "Generation of Large Scale Magnetic Fields in Spiral Galaxies: The effect of nonaxisymmetric velocity fields on the dynamo excitation of magnetic fields"
}