@article{10_4153_CMB_1981_004_7,
     author = {Wolff, Harvey},
     title = {Relative {Injectives} and {Free} {Monads}},
     journal = {Canadian mathematical bulletin},
     pages = {29--35},
     year = {1981},
     volume = {24},
     number = {1},
     doi = {10.4153/CMB-1981-004-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-004-7/}
}