@inbook{key1,
    crossref = {key2},
    title    = {Title},
    author   = {Author},
    pages    = {5--25}
}

@book{key2,
    subtitle  = {Booksubtitle},
    title     = {Booktitle},
    author    = {Author2},
    date      = {1995},
    publisher = {Publisher},
    location  = {Location}
}
