@article{MV_1969_21_1_a11,
     author = {J. D. Ke\v{c}ki\'c},
     title = {On the convergence of certain sequences, {III}},
     journal = {Matemati\v{c}ki vesnik},
     pages = {75 },
     year = {1969},
     volume = {21},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1969_21_1_a11/}
}