@article{IM_1994__116_1-3_144192, author = {G.A. Margulis and G.M. Tomanov}, title = {Invariant measures for actions of unipotent groups over local fields on homogeneous spaces.}, journal = {Inventiones mathematicae}, pages = {347--392}, publisher = {mathdoc}, volume = {116}, number = {1-3}, year = {1994}, zbl = {0816.22004}, url = {http://geodesic.mathdoc.fr/item/IM_1994__116_1-3_144192/} }