@article{UZERU_2000_2_a1,
     author = {V. T. Sardarian},
     title = {Estimates for eigenvalues and completeness of eigenfunctions of non selfadjoint semielliptic differential operators},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {10--18},
     year = {2000},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2000_2_a1/}
}