@incollection{Urquhart_1990,
    doi = {10.1007/978-94-009-0681-5_5},
    url = {https://doi.org/10.1007%2F978-94-009-0681-5_5},
    year = {1990},
    publisher = {Springer Netherlands},
    pages = {61--76},
    author = {Alasdair Urquhart},
    title = {The Complexity of Decision Procedures in Relevance Logic},
    booktitle = {Truth or Consequences}
}

@incollection{Urquhart_1990, doi = {10.1007/978-94-009-0681-5_5}, url = {https://doi.org/10.1007%2F978-94-009-0681-5_5}, year = {1990}, publisher = {Springer Netherlands}, pages = {61--76}, author = {Alasdair Urquhart}, title = {The Complexity of Decision Procedures in Relevance Logic}, booktitle = {Truth or Consequences} }