@article{04192529,
title = {Exterior parallelism for polyhedra.},
journal = {Mathematica Pannonica},
volume = {2},
year = {1991},
pages = {95-106},
zbl = {0723.51007},
language = {en},
url = {http://dml.mathdoc.fr/item/04192529}
}
Wegner, Bernd. Exterior parallelism for polyhedra.. Mathematica Pannonica, Tome 2 (1991) pp. 95-106. http://gdmltest.u-ga.fr/item/04192529/