@article{10_4153_CJM_1969_089_0,
     author = {Cohn, Richard M.},
     title = {Systems of {Ideals}},
     journal = {Canadian journal of mathematics},
     pages = {783--807},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-089-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-089-0/}
}