@article{MV_1970_22_3_a4,
     author = {A. R. Blass and L. Falcao and \v{C}. V. Stanojevi\'c},
     title = {On idempotent elements in certain associative algebras},
     journal = {Matemati\v{c}ki vesnik},
     pages = {307 },
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1970},
     url = {http://geodesic.mathdoc.fr/item/MV_1970_22_3_a4/}
}