@article{aufsatz1073,
    affiliation = {Grundlagen der Programmierung},
    title = {On clones of tree functions closed under primitive recursion},
    journal = {Acta Cybernetica},
    pages = {411--425},
    year = {2004},
    peerreview = {Nein},
    volume = {16},
    author = {Pöschel, R. and Semigrodskikh, A. and Vogler, H.}
}