@article{10_21136_CPM_1990_108723,
     author = {Chajda, Ivan},
     title = {Weak homomorphisms in implication algebra},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {61--63},
     publisher = {mathdoc},
     volume = {115},
     number = {1},
     year = {1990},
     doi = {10.21136/CPM.1990.108723},
     mrnumber = {1044014},
     zbl = {0703.08002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1990.108723/}
}