E-prints Johansen, A., Klahr, H., Henning, Th.: Gravoturbulent Formation of Planetesimals. 2006. Astrophys. J., in press (astro-ph) Klahr, H., Lin, D.N.C.: Dust Distribution in Gas Disks II: Self Induced Ring Formation Through a Clumping Instability. 2005. Astrophys. J., in press (astro-ph) Klahr, H. and Kley, W.: 3D-radiation hydro simulations of disk-planet interactions: I. Numerical algorithm and test cases. Astron. Astrophys. (2005), in press (pdf file) Johansen, A., Klahr, H.: Dust diffusion in protoplanetary discs by magnetorotational turbulence. 2005. Astrophys. J., in press (astro-ph) Wünsch, R., Klahr, H. and Rozyczka, M. 2005. Monthly Notices of the Royal Astronomical Society 362, 361-368 (ADS)