@article{NCD_2012_20_a10,
     author = {Izidor Hafner},
     title = {Slovenian {Competitions} in {Logic}},
     journal = {Review of the National Center for Digitization},
     pages = {85 },
     publisher = {mathdoc},
     volume = {20},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NCD_2012_20_a10/}
}