@article{10_21136_AM_1968_103176,
     author = {Mor\'avek, Jaroslav and Vlach, Milan},
     title = {On necessary conditions for a class of systems of linear inequalities},
     journal = {Applications of Mathematics},
     pages = {299--303},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {1968},
     doi = {10.21136/AM.1968.103176},
     mrnumber = {0240119},
     zbl = {0165.34601},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1968.103176/}
}