Unstable magnetohydrodynamical continuous spectrum of accretion disks - A new route to magnetohydrodynamical turbulence in accretion disksJ. W. S. Blokland, R. Keppens and J. P. GoedbloedA&A, 467 1 (2007) 21-35DOI: https://doi.org/10.1051/0004-6361:20066979