@article{DE_2003_39_7_a0,
     author = {A. A. Abramov and K. Balla and V. I. Ul'yanova and L. F. Yukhno},
     title = {A {Nonlinear} {Self-Adjoint} {Spectral} {Problem} for {Differential-Algebraic} {Equations}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {867--878},
     publisher = {mathdoc},
     volume = {39},
     number = {7},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_7_a0/}
}