[petsc-users] Unstructured grid info

[Praveen C]

Dear all
I have a rather basic query. I want to write a cell-centered code on 2d hybrid (tri+quad) unstructured grids. It will be only explicit time stepping but I want to use petsc to manage the grid, solutions variables and parallelization. Will use gmsh for meshing. Could you tell me where to look for some help/tutorials/examples for such an application ?
Thanks
praveen