@article{1103044956,
author = {Petersen, G. M.},
title = {Methods of summation.},
journal = {Pacific J. Math.},
volume = {4},
number = {4},
year = {1954},
pages = { 73-77},
language = {en},
url = {http://dml.mathdoc.fr/item/1103044956}
}
Petersen, G. M. Methods of summation.. Pacific J. Math., Tome 4 (1954) no. 4, pp. 73-77. http://gdmltest.u-ga.fr/item/1103044956/