@article{SM_2004_195_12_a7,
     author = {V. A. Yurko},
     title = {An  inverse spectral problem for singular non-self-adjoint differential systems},
     journal = {Sbornik. Mathematics},
     pages = {1823--1854},
     publisher = {mathdoc},
     volume = {195},
     number = {12},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_12_a7/}
}