TY  - JOUR
AU  - Norbert Knarr
TI  - The Nonexistence of Certain Topological Polygons.
JO  - Forum mathematicum
PY  - 1990
SP  - 603
EP  - 612
VL  - 2
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FORUM_1990__2_3_141660/
ID  - FORUM_1990__2_3_141660
ER  -