Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1969__25_166113, author = {J. Barback}, title = {Extensions to {Regressive} {Isols.}}, journal = {Mathematica Scandinavica}, pages = {159--177}, publisher = {mathdoc}, volume = {25}, year = {1969}, zbl = {0212.33002}, url = {http://geodesic.mathdoc.fr/item/MS2_1969__25_166113/} }
J. Barback. Extensions to Regressive Isols.. Mathematica Scandinavica, Tome 25 (1969), pp. 159-177. http://geodesic.mathdoc.fr/item/MS2_1969__25_166113/