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@misc{AMUC_1989__54-55_186023, title = {[unknown]}, journal = {Acta mathematica Universitatis Comenianae}, pages = {103--106}, publisher = {mathdoc}, volume = {54-55}, year = {1989}, url = {http://geodesic.mathdoc.fr/item/AMUC_1989__54-55_186023/} }
[unknown]. Acta mathematica Universitatis Comenianae, 54-55 (1989), pp. 103-106. http://geodesic.mathdoc.fr/item/AMUC_1989__54-55_186023/