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@article{JRAM_1989__393_153095, author = {Andrew Acker}, title = {On the qualitative theory of parametrized families of free boundaries.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {134--167}, publisher = {mathdoc}, volume = {393}, year = {1989}, zbl = {0668.35090}, url = {http://geodesic.mathdoc.fr/item/JRAM_1989__393_153095/} }
Andrew Acker. On the qualitative theory of parametrized families of free boundaries.. Journal für die reine und angewandte Mathematik, Tome 393 (1989), pp. 134-167. http://geodesic.mathdoc.fr/item/JRAM_1989__393_153095/