@incollection{Nickau_1994,
    doi = {10.1007/3-540-58140-5_25},
    url = {https://doi.org/10.1007%2F3-540-58140-5_25},
    year = {1994},
    publisher = {Springer Berlin Heidelberg},
    pages = {253--264},
    author = {Hanno Nickau},
    title = {Hereditarily sequential functionals},
    booktitle = {Logical Foundations of Computer Science}
}

@incollection{Nickau_1994, doi = {10.1007/3-540-58140-5_25}, url = {https://doi.org/10.1007%2F3-540-58140-5_25}, year = {1994}, publisher = {Springer Berlin Heidelberg}, pages = {253--264}, author = {Hanno Nickau}, title = {Hereditarily sequential functionals}, booktitle = {Logical Foundations of Computer Science} }