@article{TAC_2012_27_a3,
     author = {Ross Street},
     title = {The core of adjoint functors},
     journal = {Theory and applications of categories},
     pages = {47--64},
     publisher = {mathdoc},
     volume = {27},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2012_27_a3/}
}