@article{10_21136_AM_1984_104096,
     author = {Mor\'avek, Jaroslav},
     title = {On hardly linearly provable systems},
     journal = {Applications of Mathematics},
     pages = {286--293},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {1984},
     doi = {10.21136/AM.1984.104096},
     mrnumber = {0754080},
     zbl = {0551.68042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1984.104096/}
}