%0 Journal Article %A Johann Linhart %A Ronald Ortner %T On the combinatorial structure of arrangements of oriented pseudocircles %J The electronic journal of combinatorics %D 2004 %V 11 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/1783/ %R 10.37236/1783 %F 10_37236_1783