@article{10_1017_S0017089500007710,
     author = {Brandl, Rolf},
     title = {Groups whose lattices of normal subgroups are distributive},
     journal = {Glasgow mathematical journal},
     pages = {183--188},
     year = {1989},
     volume = {31},
     number = {2},
     doi = {10.1017/S0017089500007710},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007710/}
}