?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Building+Blocks+of+Upward+Planar+Digraphs&rft.creator=Healy%2C+Patrick&rft.creator=Lynch%2C+Karol&rft.subject=P.840+Upward&rft.subject=G.770+Planarity+Testing&rft.subject=P.540+Planar&rft.description=We+show+that+a+digraph+is+upward+planar+if+and+only+if+its+biconnected+components+have+certain+properties.%0D%0A&rft.publisher=Springer&rft.contributor=Pach%2C+J%C3%83%C2%A1nos&rft.date=2004&rft.type=Conference+Paper&rft.type=NonPeerReviewed&rft.identifier=Healy%2C+Patrick+and+Lynch%2C+Karol+(2004)+Building+Blocks+of+Upward+Planar+Digraphs.+[Conference+Paper]&rft.relation=http%3A%2F%2Fgdea.informatik.uni-koeln.de%2F596%2F