Nadine Schwartges, Joachim Spoerhase, Alexander Wolff. Approximation Algorithms for the Maximum Leaf Spanning Tree Problem on Acyclic Digraphs. In Roberto Solis-Oba, Giuseppe Persiano, editors, Approximation and Online Algorithms - 9th International Workshop, WAOA 2011, Saarbrücken, Germany, September 8-9, 2011, Revised Selected Papers. Volume 7164 of Lecture Notes in Computer Science, pages 77-88, Springer, 2011. [doi]
Abstract is missing.