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Meyer, U., & Sanders, P. (1998). $\Delta$-Stepping: A Parallel Single Source Shortest Path Algorithm. In G., Bilardi, G. F., Italiano, A., Pietracaprina, & G., Pucci (Eds.), Proceedings of the 6th Annual European Symposium on Algorithms (ESA-98) (pp. 393-404). Berlin, Germany: Springer.