%0 Journal Article %A Ryo Nikkuni %T On the Wu invariants for immersions of a graph into the plane %J Homology, homotopy, and applications %D 2010 %P 45-60 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4310/HHA.2010.v12.n1.a5/ %R 10.4310/HHA.2010.v12.n1.a5 %G en %F HHA_2010_12_1_a5