000
00286nam a2200109 4500
008
160616s 000 0
245
_a
Boundary value problems for second elliptic equations
100
_a
Bitsadze, A.V
500
_a
B334,1,2 K81
942
_c
BK
_2
BK3843
080
_a
517.583 BIT
999
_c
3843
_d
3843