000 00286nam a2200109 4500
008 160616s 000 0
245 _aBoundary value problems for second elliptic equations
100 _aBitsadze, A.V
500 _aB334,1,2 K81
942 _cBK
_2BK3842
080 _a517.583 BIT
999 _c3842
_d3842