@misc{10_21136_MB_1991_116993,
     title = {Announcement. {Mathematica} {Bohemica}},
     journal = {Mathematica Bohemica},
     publisher = {mathdoc},
     volume = {116},
     number = {1},
     year = {1991},
     doi = {10.21136/MB.1991.116993},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.116993/}
}