@article{aufsatz59240,
    affiliation = {Grundlagen der Programmierung},
    title = {The OI-hierarchy is closed under control},
    journal = {Inform. and Comput.},
    pages = {187--204},
    year = {1988},
    peerreview = {Nein},
    volume = {78},
    author = {Vogler, Heiko}
}