@article{RLIN_1992_9_3_2_a0,
     author = {Sobolevskii, Pavel E.},
     title = {Dependence of fractional powers of elliptic operators on boundary conditions},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {75--78},
     publisher = {mathdoc},
     volume = {Ser. 9, 3},
     number = {2},
     year = {1992},
     zbl = {0794.35041},
     mrnumber = {385645},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_1992_9_3_2_a0/}
}