@article{10_14708_cm_v56i2_1233,
     author = {Jurancy Josefina Ere\'u and Lorena Maria Lopez and Nelson Jos\'e Merentes},
     title = {On second \(\kappa\)-variation},
     journal = {Commentationes Mathematicae},
     pages = { 209\ensuremath{-}224},
     publisher = {mathdoc},
     volume = {56},
     number = {2},
     year = {2016},
     doi = {10.14708/cm.v56i2.1233},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v56i2.1233/}
}