D. Borwein et R. Kiesel, WEIGHTED MEANS AND SUMMABILITY BY GENERALIZED NORLUND AND OTHER METHODS, Journal of mathematical analysis and applications, 184(3), 1994, pp. 607-619
It is proved that if the weighted means of a sequence satisfy certain
order conditions, then the sequence is summable by every method of a f
amily of methods GAMMA(p) based on a given sequence (p(n)). The family
GAMMA(p) includes the power series method J(p) and the generalized No
rlund method (N, p, p). (C) 1994 Academic Press, Inc.