@article{10_1007_s10587_014_0101_1,
     author = {Li, Weiqing and Ouyang, Baiyu},
     title = {$(n,d)$-injective covers, $n$-coherent rings, and $(n,d)$-rings},
     journal = {Czechoslovak Mathematical Journal},
     pages = {289--304},
     publisher = {mathdoc},
     volume = {64},
     number = {2},
     year = {2014},
     doi = {10.1007/s10587-014-0101-1},
     mrnumber = {3277736},
     zbl = {06391494},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-014-0101-1/}
}