@article{10_21136_CPM_1989_108703,
     author = {Havrda, Jan},
     title = {On a certain mapping on the set with orthogonality},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {160--164},
     publisher = {mathdoc},
     volume = {114},
     number = {2},
     year = {1989},
     doi = {10.21136/CPM.1989.108703},
     mrnumber = {1063761},
     zbl = {0672.06006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1989.108703/}
}