<https://www.deepdyve.com/lp/springer-journals/routing-in-vlsi-layout-3nDOS3382L>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://plosjournal.deepdyve.com/lp/springer-journals/routing-in-vlsi-layout-3nDOS3382L>