@article{MABA_1988_2_1_a9,
     author = {A. B. Andreev and R. D. Lazarov},
     title = {Lumped {Mass} {Finite} {Element} {Method} for {Parabolic} and {Eigenvalue} {Problems}},
     journal = {Mathematica balkanica},
     pages = {85},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/MABA_1988_2_1_a9/}
}