@article{MABA_2006_20_1_a2,
     author = {Ivan Georgiev and Svetozar Margenov},
     title = {Element {Preconditioning} {Technique} for {Rotated} {Bilinear} {FEM} {Elliptic} {Systems}},
     journal = {Mathematica balkanica},
     pages = {39},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/MABA_2006_20_1_a2/}
}