@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/