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@article{MZ_1988__198_3_173921, author = {C. Ionesco Tulcea}, title = {On the {Approximation} of {Hausdorff} {Upper} {Semi-Continuous} {Correspondences.}}, journal = {Mathematische Zeitschrift}, pages = {207--220}, publisher = {mathdoc}, volume = {198}, number = {3}, year = {1988}, url = {http://geodesic.mathdoc.fr/item/MZ_1988__198_3_173921/} }
C. Ionesco Tulcea. On the Approximation of Hausdorff Upper Semi-Continuous Correspondences.. Mathematische Zeitschrift, Tome 198 (1988) no. 3, pp. 207-220. http://geodesic.mathdoc.fr/item/MZ_1988__198_3_173921/