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@article{MM2_1982__37_154828, author = {Lech Drewnowski}, title = {A {Solution} to a {Problem} of de {Wilde} and {Tsirulnikov.}}, journal = {Manuscripta mathematica}, pages = {61--64}, publisher = {mathdoc}, volume = {37}, year = {1982}, zbl = {0486.46003}, url = {http://geodesic.mathdoc.fr/item/MM2_1982__37_154828/} }
Lech Drewnowski. A Solution to a Problem of de Wilde and Tsirulnikov.. Manuscripta mathematica, Tome 37 (1982), pp. 61-64. http://geodesic.mathdoc.fr/item/MM2_1982__37_154828/