@article{10_4153_CJM_1974_025_0,
     author = {Colwell, Peter},
     title = {Improved {Versions} of {Forms} of {Plessner's} {Theorem}},
     journal = {Canadian journal of mathematics},
     pages = {251--255},
     year = {1974},
     volume = {26},
     number = {1},
     doi = {10.4153/CJM-1974-025-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-025-0/}
}