@article{AUCMP_1995__36_1_a2,
     author = {Beran, Ladislav},
     title = {On midpoints in lattices},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {9--15},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {1995},
     mrnumber = {1366504},
     zbl = {0821.06005},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1995__36_1_a2/}
}