@article{UFA_2017_9_4_a8,
     author = {M. N. Oreshina},
     title = {Spectral decomposition of   normal operator in   real {Hilbert} space},
     journal = {Ufa mathematical journal},
     pages = {85--96},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2017_9_4_a8/}
}