LÍN, Václav. Decision-theoretic troubleshooting: hardness of approximation. In: Proceedings of the Sixth European Workshop on Probabilistic Graphical Models, PGM'12. Granada: DECSAI, University of Granada, 2012, s. 195-202. ISBN 978-84-15536-57-4. Available: http://library.utia.cas.cz/separaty/2012/MTR/lin-decision-theoretic troubleshooting hardness of approximation.pdf