@article{10_14708_ma_v45i2_4385,
     author = {Marek Skarupski and Krzysztof J. Szajowski},
     title = {CORRIGENDUM-Duration problem: basic concept and some extensions},
     journal = {Mathematica Applicanda},
     pages = { 211--216},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {2017},
     doi = {10.14708/ma.v45i2.4385},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v45i2.4385/}
}