@article{10_4153_CMB_1974_066_5,
     author = {Cheung, Alan L. C.},
     title = {Adjoints of a {Geometry}},
     journal = {Canadian mathematical bulletin},
     pages = {363--365},
     year = {1974},
     volume = {17},
     number = {3},
     doi = {10.4153/CMB-1974-066-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-066-5/}
}