Gernot Veit Batz Daniel Delling Peter Sanders Christian Vetter Time-Dependent Contraction Hierarchies. 97-105 2009 ALENEX http://www.siam.org/proceedings/alenex/2009/alx09_010_batzg.pdf conf/alenex/2009 db/conf/alenex/alenex2009.html#BatzDSV09