Reference Categorical interpolation: Descent and the Beck-Chevalley condition without direct images [pavlovic-descent-beck-chevalley-1991]

 @inproceedings
{pavlovic-descent-beck-chevalley-1991, address={Berlin, Heidelberg}, title={Categorical interpolation: Descent and the Beck-Chevalley condition without direct images}, ISBN={978-3-540-46435-8}, DOI={10.1007/BFb0084229}, booktitle={Category Theory}, publisher={Springer}, author={Pavlović, Duško}, editor={Carboni, Aurelio and Pedicchio, Maria Cristina and Rosolini, Guiseppe}, year={1991}, pages={306–325},language={en} }