@incollection{Keller_1985,
    doi = {10.1007/3-540-15670-4_23},
    url = {https://doi.org/10.1007%2F3-540-15670-4_23},
    year = {1985},
    publisher = {Springer Berlin Heidelberg},
    pages = {479--496},
    author = {Robert M. Keller and Prakash Panangaden},
    title = {Semantics of networks containing indeterminate operators},
    booktitle = {Lecture Notes in Computer Science}
}

@incollection{Keller_1985, doi = {10.1007/3-540-15670-4_23}, url = {https://doi.org/10.1007%2F3-540-15670-4_23}, year = {1985}, publisher = {Springer Berlin Heidelberg}, pages = {479--496}, author = {Robert M. Keller and Prakash Panangaden}, title = {Semantics of networks containing indeterminate operators}, booktitle = {Lecture Notes in Computer Science} }