@article{SM_2006_197_5_a4,
     author = {D. A. Sapronov and A. E. Shishkov},
     title = {Asymptotic behaviour of supports of solutions of
},
     journal = {Sbornik. Mathematics},
     pages = {753--790},
     publisher = {mathdoc},
     volume = {197},
     number = {5},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2006_197_5_a4/}
}