@article{10_14708_wm_v1i1_2844,
     author = {E. Otto},
     title = {O pochodnej funkcji wyk{\l}adniczej},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 122--125},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1955},
     doi = {10.14708/wm.v1i1.2844},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v1i1.2844/}
}