@article{IM2_2003_67_5_a1,
     author = {A. A. Kovalevsky},
     title = {On the summability of entropy solutions for the {Dirichlet} problem in a~class of non-linear elliptic fourth-order equations},
     journal = {Izvestiya. Mathematics },
     pages = {881--894},
     publisher = {mathdoc},
     volume = {67},
     number = {5},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2003_67_5_a1/}
}