@incollection{Asperti_2006,
    doi = {10.1007/11617990_2},
    url = {https://doi.org/10.1007%2F11617990_2},
    year = {2006},
    publisher = {Springer Berlin Heidelberg},
    pages = {17--32},
    author = {Andrea Asperti and Ferruccio Guidi and Claudio Sacerdoti Coen and Enrico Tassi and Stefano Zacchiroli},
    title = {A Content Based Mathematical Search Engine: Whelp},
    booktitle = {Lecture Notes in Computer Science}
}

@incollection{Asperti_2006, doi = {10.1007/11617990_2}, url = {https://doi.org/10.1007%2F11617990_2}, year = {2006}, publisher = {Springer Berlin Heidelberg}, pages = {17--32}, author = {Andrea Asperti and Ferruccio Guidi and Claudio Sacerdoti Coen and Enrico Tassi and Stefano Zacchiroli}, title = {A Content Based Mathematical Search Engine: Whelp}, booktitle = {Lecture Notes in Computer Science} }