@article{GMJ_1995__2_3_47457,
     author = {Oniani, G.},
     title = {Some negative results concerning the process of {Fej\'er} type trigonometric convolution.},
     journal = {Georgian Mathematical Journal},
     pages = {313--322},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1995},
     zbl = {0842.42004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_1995__2_3_47457/}
}