@article{BAG_1991__32_138496,
     author = {Gerd Richter},
     title = {Some remarks on modularity in prealgebraic and algebraic lattices},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {135--140},
     year = {1991},
     volume = {32},
     zbl = {0764.06004},
     url = {http://geodesic.mathdoc.fr/item/BAG_1991__32_138496/}
}