@article{10_1017_S0017089500032341,
     author = {Malfait, Wim and Szczepa\'nski, Andrzej},
     title = {Almost-Bieberbach groups with (in)finite outer automorphism group},
     journal = {Glasgow mathematical journal},
     pages = {47--62},
     year = {1998},
     volume = {40},
     number = {1},
     doi = {10.1017/S0017089500032341},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500032341/}
}