@incollection{Ghilardi_2017,
    doi = {10.1007/978-3-319-66167-4_18},
    url = {https://doi.org/10.1007%2F978-3-319-66167-4_18},
    year = {2017},
    publisher = {Springer International Publishing},
    pages = {316--332},
    author = {Silvio Ghilardi and Alessandro Gianola},
    title = {Interpolation, Amalgamation and Combination (The Non-disjoint Signatures Case)},
    booktitle = {Frontiers of Combining Systems}
}

@incollection{Ghilardi_2017, doi = {10.1007/978-3-319-66167-4_18}, url = {https://doi.org/10.1007%2F978-3-319-66167-4_18}, year = {2017}, publisher = {Springer International Publishing}, pages = {316--332}, author = {Silvio Ghilardi and Alessandro Gianola}, title = {Interpolation, Amalgamation and Combination (The Non-disjoint Signatures Case)}, booktitle = {Frontiers of Combining Systems} }