@article{10_4153_CMB_1981_040_7,
     author = {Feigelstock, Shalom},
     title = {On a {Paper} of {G.} {Mason}},
     journal = {Canadian mathematical bulletin},
     pages = {247--248},
     year = {1981},
     volume = {24},
     number = {2},
     doi = {10.4153/CMB-1981-040-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-040-7/}
}