@article{GDZPPN002071622, title = {Kleine Studie zum Tangentialpolyeder.}, journal = {Elemente der Mathematik}, volume = {1}, year = {1946}, pages = {11-12}, zbl = {0061.38204}, url = {http://dml.mathdoc.fr/item/GDZPPN002071622} }
Hadwiger, H. Kleine Studie zum Tangentialpolyeder.. Elemente der Mathematik, Tome 1 (1946) pp. 11-12. http://gdmltest.u-ga.fr/item/GDZPPN002071622/