@article{UZERU_2003_1_a0,
     author = {Yu. R. Hakopian and H. A. Hovhannisyan},
     title = {Algebraic multilevel preconditioner for second order finite element approximation in rectangular domains. {I.} {Two} level preconditioner},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {3--13},
     publisher = {mathdoc},
     number = {1},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2003_1_a0/}
}