@article{1195525242,
author = {Matsumoto, Kishi},
title = {Lebesgue's constant of $\left( {R,\lambda ,K} \right)$ Summation},
journal = {Proc. Japan Acad.},
volume = {32},
number = {9},
year = {1956},
pages = { 658-661},
language = {en},
url = {http://dml.mathdoc.fr/item/1195525242}
}
Matsumoto, Kishi. Lebesgue's constant of $\left( {R,\lambda ,K} \right)$ Summation. Proc. Japan Acad., Tome 32 (1956) no. 9, pp. 658-661. http://gdmltest.u-ga.fr/item/1195525242/