@article{1077491083,
author = {Harrold, Jr., O. G.},
title = {Hereditary arc sums},
journal = {Duke Math. J.},
volume = {5},
number = {1},
year = {1939},
pages = { 111-117},
language = {en},
url = {http://dml.mathdoc.fr/item/1077491083}
}
Harrold, Jr., O. G. Hereditary arc sums. Duke Math. J., Tome 5 (1939) no. 1, pp. 111-117. http://gdmltest.u-ga.fr/item/1077491083/