Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1971__30_4_115155, author = {Silberger, D.M.}, title = {Borders and roots of a word}, journal = {Portugaliae mathematica}, pages = {191--199}, publisher = {mathdoc}, volume = {30}, number = {4}, year = {1971}, mrnumber = {0302791}, zbl = {0259.20032}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1971__30_4_115155/} }
Silberger, D.M. Borders and roots of a word. Portugaliae mathematica, Tome 30 (1971) no. 4, pp. 191-199. http://geodesic.mathdoc.fr/item/PORMA_1971__30_4_115155/