@article{10_21136_MB_2003_134184,
     author = {Chajda, Ivan},
     title = {Generalized deductive systems in subregular varieties},
     journal = {Mathematica Bohemica},
     pages = {319--324},
     publisher = {mathdoc},
     volume = {128},
     number = {3},
     year = {2003},
     doi = {10.21136/MB.2003.134184},
     mrnumber = {2012608},
     zbl = {1051.08002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2003.134184/}
}