@article{TAC_2022_38_a9,
     author = {J. R. A. Gray},
     title = {A note on images of cover relations},
     journal = {Theory and applications of categories},
     pages = {311--318},
     year = {2022},
     volume = {38},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2022_38_a9/}
}