?url_ver=Z39.88-2004&rft_id=doi%3A10.1007%2FBFb0042263&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Kurzhanski%2C+A.B.&rft.aulast=Kurzhanski&rft.aufirst=A.B.&rft.date=1988&rft.isbn=978-3-540-39161-6&rft.title=Set+valued+solutions+to+control+problems+and+their+approximations&rft.btitle=Analysis+and+Optimization+of+Systems&rft.genre=bookitem