@article{10_4153_CJM_1970_068_6,
     author = {Izumi, Masako and Izumi, Shin-Ichi},
     title = {Localization {Problem} of the {Absolute} {Riesz} and {Absolute} {N\"orlund} {Summabilities} of {Fourier} {Series}},
     journal = {Canadian journal of mathematics},
     pages = {615--625},
     year = {1970},
     volume = {22},
     number = {3},
     doi = {10.4153/CJM-1970-068-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-068-6/}
}