On hydrodynamic shear turbulence in stratified Keplerian disks: Transient growth of small-scale 3D vortex mode perturbationsA. G. Tevzadze, G. D. Chagelishvili, J.-P. Zahn, R. G. Chanishvili and J. G. LominadzeA&A, 407 3 (2003) 779-786DOI: https://doi.org/10.1051/0004-6361:20030867