GEISBERGER, Robert; SCHIEFERDECKER, Dennis. Heuristic Contraction Hierarchies with Approximation Guarantee. Proceedings of the International Symposium on Combinatorial Search, [S. l.], v. 1, n. 1, p. 31–38, 2010. DOI: 10.1609/socs.v1i1.18161. Disponível em: https://ojs.aaai.org/index.php/SOCS/article/view/18161. Acesso em: 26 may. 2026.