Baykan,https://doi.org/10.4230/LIPICS.STACS.2009.1809__Eda, Henzinger, M. H., Keller, S. F., de Castelberg, S., &; Kinzler, M. (2009). A comparison of techniques for sampling web pages. In 26th International Symposium on Theoretical Aspects of Computer Science (Vol. 3, pp. 13–30). Freiburg, Germany: Schloss Dagstuhl - Leibniz-Zentrum für Informatik.https://doi.org/10.4230/LIPICS.STACS.2009.1809 
LibreCat: https://research-explorer.ista.ac.at/record/11912
DOI: 10.4230/LIPICS.STACS.2009.1809
arXiv: 0902.1604