@bookinbook{amorosa,
    author = {Boccaccio, Giovanni},
    title = {L'Amorosa visione},
    year = {1342},
    crossref = {baxandall1971},
}

@book{baxandall1971,
 author={Baxandall, Michael},
 title = {Giotto and the Orators},
 subtitle = {Humanist Observers of Painting in Italy and the Discovery of Pictorial Composition 1350-1450},
 year = {1971},
 publisher = {Oxford University Press},
 location = {Oxford, England},
 }