@article{MV_1973_25_1_a4,
     author = {Gh. Constantin},
     title = {$\omega$-compact elements of normed algebras},
     journal = {Matemati\v{c}ki vesnik},
     pages = {29 },
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1973},
     url = {http://geodesic.mathdoc.fr/item/MV_1973_25_1_a4/}
}