@article{10_1007_s10587_013_0038_9,
     author = {Borna, Keivan and Mohajer-Naser, Abolfazl},
     title = {Uppers to zero in $R[x]$ and almost principal ideals},
     journal = {Czechoslovak Mathematical Journal},
     pages = {565--572},
     publisher = {mathdoc},
     volume = {63},
     number = {2},
     year = {2013},
     doi = {10.1007/s10587-013-0038-9},
     mrnumber = {3073979},
     zbl = {06236432},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-013-0038-9/}
}