@article{MASLO_1966__16_4_a0,
     author = {Johnson, Arnold A.},
     title = {Reflectors and {Coreflectors} on {Diagrams}},
     journal = {Mathematica slovaca},
     pages = {309--319},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {1966},
     mrnumber = {0210762},
     zbl = {0219.18001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1966__16_4_a0/}
}