@article{GMJ_2003__10_1_51553,
     author = {Janelidze, G.},
     title = {Internal crossed modules.},
     journal = {Georgian mathematical journal},
     pages = {99--114},
     year = {2003},
     volume = {10},
     number = {1},
     zbl = {1069.18009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_2003__10_1_51553/}
}