000
00263nam a2200109 4500
008
160616s 000 0
245
_a
Shorts paths, variational problems
100
_a
Lyusternik, L.A
500
_a
B42 K41
942
_c
BK
_2
BK3000
080
_a
517.97 LYU
999
_c
3000
_d
3000