@article{10_4153_CJM_1974_017_9,
     author = {Dawson, Jeffrey and Dobbs, David E.},
     title = {On {Going} {Down} in {Polynomial} {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {177--184},
     year = {1974},
     volume = {26},
     number = {1},
     doi = {10.4153/CJM-1974-017-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-017-9/}
}