@article{01460281, title = {On the boundary of an extremal body.}, journal = {Beitr\"age zur Algebra und Geometrie}, volume = {40}, year = {1999}, pages = {331-342}, zbl = {0960.52015}, language = {en}, url = {http://dml.mathdoc.fr/item/01460281} }
Horváth, Ákos G. On the boundary of an extremal body.. Beiträge zur Algebra und Geometrie, Tome 40 (1999) pp. 331-342. http://gdmltest.u-ga.fr/item/01460281/