@article{MABA_2006_20_1_a5,
     author = {N. Tarkhanov},
     title = {Unitary {Solutions} of {Partial} {Differential} {Equations}},
     journal = {Mathematica balkanica},
     pages = {73},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/MABA_2006_20_1_a5/}
}