@article{10_4153_CJM_1978_019_5,
     author = {Anderson, David F.},
     title = {Subrings of {Generated} by {Monomials}},
     journal = {Canadian journal of mathematics},
     pages = {215--224},
     year = {1978},
     volume = {30},
     number = {1},
     doi = {10.4153/CJM-1978-019-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-019-5/}
}