@article{SIGMA_2011_7_a15,
     author = {Sergey M. Zagorodnyuk},
     title = {On the {Complex} {Symmetric} and {Skew-Symmetric} {Operators} with {a~Simple} {Spectrum}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2011},
     volume = {7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a15/}
}