@article{10_4064_cm_23_1_25_27,
     author = {M. G. Stone},
     title = {Proper congruences do not imply a modular congruence lattice},
     journal = {Colloquium Mathematicum},
     pages = {25--27},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1971},
     doi = {10.4064/cm-23-1-25-27},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-23-1-25-27/}
}