@article{MV_1968_20_2_a11,
     author = {C. M. Patel},
     title = {On the {Euler} means of orthogonal series},
     journal = {Matemati\v{c}ki vesnik},
     pages = {217 },
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/MV_1968_20_2_a11/}
}