  We review our recent work on the formation and evolution of disks with in
triaxial dark matter (DM) halos by means of numerical simulations, including
star formation and feedback from stellar evolution. The growing disks are
strongly in fluenced by shapes of DM halos and modify them in turn. Disk
parameters are in a broad agreement with those in the local universe. Gas-rich
stellar bars grow in tandem with the disk and facilitate the angular momentum
redistribution in the system and radial gas inflow. Nested bars appear to form
as a by-product. Interactions between various non-axisymmetric components --
bars, disks and halos lead to decay of bars or washing out of ellipticity in
the inner halo.
