@article{CLTM_1992_1992_1_a19,
     author = {Rakocevic, Vladimir},
     title = {Nota sobre elementos regulares en \'algebras de {Calkin.}},
     journal = {Collectanea mathematica},
     pages = {37-42},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1992_1992_1_a19/}
}