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@article{10_4064_am_3_3_4_258_284, author = {J. Perkal}, title = {O d{\l}ugo\'sci krzywych empirycznych}, journal = {Applicationes Mathematicae}, pages = {258--284}, publisher = {mathdoc}, volume = {3}, number = {3}, year = {1958}, doi = {10.4064/am-3-3-4-258-284}, language = {pl}, url = {http://geodesic.mathdoc.fr/articles/10.4064/am-3-3-4-258-284/} }
J. Perkal. O długości krzywych empirycznych. Applicationes Mathematicae, Tome 3 (1958) no. 3, pp. 258-284. doi : 10.4064/am-3-3-4-258-284. http://geodesic.mathdoc.fr/articles/10.4064/am-3-3-4-258-284/
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