1. Bodlaender, H.L.: A tourist guide through treewidth. Acta Cybern. 11, 1–23 (1993)
2. Borodin, A.: On-line Computation and Competitive Analysis. Cambridge University Press, Cambridge (1998)
3. de Koster, R.: Performance approximation of pick-to-belt orderpicking systems. Eur. J. Oper. Res. 92, 558–573 (1994)
4. Dehmer, M., Emmert-Streib, F. (eds.): Quantitative Graph Theory: Mathematical Foundations and Applications. CRC Press Inc., New York (2014)
5. Lecture Notes in Computer Science,1998