@article{GDZPPN002349469, title = {The Algebra of Polyhedra and the Dehn-Sydler Theorem.}, journal = {Mathematica Scandinavica}, volume = {22}, year = {1968}, pages = {241-256}, zbl = {0183.49803}, url = {http://dml.mathdoc.fr/item/GDZPPN002349469} }
Jessen, Borge. The Algebra of Polyhedra and the Dehn-Sydler Theorem.. Mathematica Scandinavica, Tome 22 (1968) pp. 241-256. http://gdmltest.u-ga.fr/item/GDZPPN002349469/