@article{ADM_2003_3_a1,
     author = {R\"udiger G\"obel and Simone L. Wallutis},
     title = {An algebraic version of the {Strong} {Black} {Box}},
     journal = {Algebra and discrete mathematics},
     pages = {7--45},
     year = {2003},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2003_3_a1/}
}