@article{CMFD_2010_36_a3,
     author = {Yu. V. Gandel'},
     title = {Boundary-value problems for the {Helmholtz} equation and their discrete mathematical models},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {36--49},
     publisher = {mathdoc},
     volume = {36},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2010_36_a3/}
}