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@article{JRAM_1984__352_152656, author = {Johan P. Hansen}, title = {Double-points of compositions.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {71--80}, publisher = {mathdoc}, volume = {352}, year = {1984}, zbl = {0534.14003}, url = {http://geodesic.mathdoc.fr/item/JRAM_1984__352_152656/} }
Johan P. Hansen. Double-points of compositions.. Journal für die reine und angewandte Mathematik, Tome 352 (1984), pp. 71-80. http://geodesic.mathdoc.fr/item/JRAM_1984__352_152656/