@article{ZNSL_2008_359_a3,
     author = {Kh. D. Ikramov},
     title = {Decomplexification of eigenvalue and coneigenvalue problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {36--41},
     publisher = {mathdoc},
     volume = {359},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2008_359_a3/}
}