@article{VMP_2012_13_3_a4,
     author = {V. A. Morozov and V. G. Lezhnev and N. M. Tokarev},
     title = {A variational problem for the biharmonic equation},
     journal = {Numerical methods and programming},
     pages = {409--412},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2012_13_3_a4/}
}