@article{JSFU_2011_4_2_a9,
     author = {Alexander A. Shlapunov},
     title = {Boundary problems for {Helmholtz} equation and the {Cauchy} problem for {Dirac} operators},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {217--228},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2011_4_2_a9/}
}