Sandro Pirkwieser, Günther R. Raidl, Jakob Puchinger. A Lagrangian Decomposition/Evolutionary Algorithm Hybrid for the Knapsack Constrained Maximum Spanning Tree Problem. Chapter in Recent Advances in Evolutionary Computation for Combinatorial Optimization (C. Cotta and J. van~Hemert), volume 153 of Studies in Computational Intelligence, pages 69-85, 2008, Springer. (Note: previous technical report version at https://www.ac.tuwien.ac.at/files/pub/pirkwieser-07a.pdf)