@article{DE_1999_35_4_a13,
     author = {V. V. Dubrovskii and E. A. Puzankova},
     title = {An estimate for the difference of spectral functions, and regularized trace formulas for a power of the {Laplace} operator defined on a triangle or a square, in $L_p$, $1\le p\le2$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {552--555},
     publisher = {mathdoc},
     volume = {35},
     number = {4},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_4_a13/}
}