00364nam a2200133 a 450000500170000002000150001708200150003210000230004724500410007026000290011130000310014049000390017170000200021020251203110252.0  a038794947X  a532.5bARN  aArnold, Vladimir I  aTopological methods in hydrodynamics  aNew YorkbSpringerc1999  axv,376p.c78 ill.c22cm HB  aApplied mathematical sciencesd125  aKhesin, Boris A