@article{TAC_2016_31_a15,
     author = {James Richard Andrew Gray and Tamar Janelidze-Gray},
     title = {Relative internal actions},
     journal = {Theory and applications of categories},
     pages = {444--461},
     publisher = {mathdoc},
     volume = {31},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2016_31_a15/}
}