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https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/8072 OPUS 4 | An exact high performance solver for Steiner tree problems in graphs and related problems high performance steiner tree opus exact solver https://research.ibm.com/publications/a-weighted-steiner-tree-based-global-router-with-simultaneous-length-and-density-minimization A Weighted Steiner Tree-Based Global Router with Simultaneous Length and Density Minimization for... A Weighted Steiner Tree-Based Global Router with Simultaneous Length and Density Minimization for IEEE Transactions on Computer-Aided Design of Integrated... a weighted steiner tree based global router https://ir.cwi.nl/pub/11963 Centrum Wiskunde & Informatica: New reduction techniques for the group Steiner tree problem steiner tree problem for the centrum wiskunde informatica https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2023.63 An O(log k)-Approximation for Directed Steiner Tree in Planar Graphs steiner tree planar graphs log approximation directed https://ac.tuwien.ac.at/publication/parameterized-complexity-of-directed-steiner-tree-on-sparse-graphs-2/ Parameterized Complexity of Directed Steiner Tree on Sparse Graphs | AC Group | TU Wien Jan 1, 2017 - *SIAM J. Discrete Math.*, volume 31, number 2, pages 1294–1327, 2017. parameterized complexity steiner tree sparse graphs tu wien directed