@article{VMUMM_1995_4_a18,
     author = {O. A. Ziza},
     title = {On the rate of convergence of $(\varphi,\lambda)$-means of orthogonal series},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {93--96},
     publisher = {mathdoc},
     number = {4},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1995_4_a18/}
}