@article{10_4064_cm_63_1_41_44,
     author = {G. Gr\"atzer and A. Kisielewicz and B. Wolk},
     title = {An equational basis in four variables for the three-element tournament},
     journal = {Colloquium Mathematicum},
     pages = {41--44},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1992},
     doi = {10.4064/cm-63-1-41-44},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-63-1-41-44/}
}