@article{RCM_2015_49_2_a4,
     author = {Mete B. Calci and Burcu Ungor and Abdullah Harmanci},
     title = {Central quasipolar rings},
     journal = {Revista colombiana de matematicas},
     pages = {281--292},
     year = {2015},
     volume = {49},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/RCM_2015_49_2_a4/}
}