TY  - JOUR
AU  - Walter Didimo
AU  - Maurizio Pizzonia
TI  - Upward Embeddings and Orientations of Undirected Planar Graphs
JO  - Journal of Graph Algorithms and Applications
PY  - 2003
SP  - 221
EP  - 241
VL  - 7
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00068/
DO  - 10.7155/jgaa.00068
LA  - en
ID  - JGAA_2003_7_2_a6
ER  -