@article{10_21136_MB_1994_126081,
     author = {Chajda, Ivan},
     title = {An algebra of quasiordered logic},
     journal = {Mathematica Bohemica},
     pages = {129--135},
     publisher = {mathdoc},
     volume = {119},
     number = {2},
     year = {1994},
     doi = {10.21136/MB.1994.126081},
     mrnumber = {1293245},
     zbl = {0816.06007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1994.126081/}
}