@article{ADM_2013_16_1_a11,
     author = {Sankar Sagi},
     title = {Ideals in $(\mathcal{Z}^{+},\leq_{D})$},
     journal = {Algebra and discrete mathematics},
     pages = {107--115},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2013_16_1_a11/}
}