@article{MM_1991_3_1_a12,
     author = {A. B. Kycherov and A. Bastis},
     title = {Fast iterative methods for solving in the real arithmetic the discrete {Helmholtz} equation with a~complex coefficient},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {115--121},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1991_3_1_a12/}
}