@article{MV_1969_21_4_a2,
     author = {I. Istratescu},
     title = {On operators with uniformly bounded iterates},
     journal = {Matemati\v{c}ki vesnik},
     pages = {373 },
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/MV_1969_21_4_a2/}
}