@article{BASM_2007_2_a2,
     author = {A. I. Kashu},
     title = {On natural and conatural sets of left ideals of a~ring},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {25--32},
     publisher = {mathdoc},
     number = {2},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2007_2_a2/}
}