@article{10_1017_S0017089500001956,
     author = {Spitznagel, C.},
     title = {The lattice of congruences on a band of groups},
     journal = {Glasgow mathematical journal},
     pages = {187--197},
     year = {1973},
     volume = {14},
     number = {2},
     doi = {10.1017/S0017089500001956},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001956/}
}