000 00317nam a22001217a 4500
005 20250603120244.0
008 250603b |||||||| |||| 00| 0 eng d
041 _aeng
100 _aBaslaev, V
245 _aDifferential operators and spectral theory
_cby V. Buslaev and others
260 _bA M S
_c1999
942 _cBK
999 _c39150
_d39150