@article{ASUO_2022_XXX_2_a7,
     author = {Grigore C\u{a}lug\u{a}reanu and Horia F. Pop ~
              },
     title = {Negative clean rings},
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XXX},
     number = {2},
     year = {2022},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2022_XXX_2_a7/}
}