@article{SIGMA_2009_5_a6,
     author = {Ebru Ergun},
     title = {On the {Spectrum} of {a~Discrete} {Non-Hermitian} {Quantum} {System}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2009},
     volume = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a6/}
}