@inproceedings{toepfer2011segmentation,
  author = {Toepfer, Martin and Kluegl, Peter and Hotho, Andreas and Puppe, Frank},
  booktitle = {Workshop Notes of the LWA 2011 - Learning, Knowledge, Adaptation},
  interhash = {3bd61ad3f9b4f1e221e79ecb3b4cae39},
  intrahash = {b707fa6ddf5b3010827868ecebc60d6a},
  title = {Segmentation of References with Skip-Chain Conditional Random Fields for Consistent Label Transitions},
  url = {http://ki.informatik.uni-wuerzburg.de/papers/pkluegl/2011-LWA-SkYp.pdf},
  year = 2011
}

@techreport{elahmad2011robustness,
  abstract = {We report a novel attack on two CAPTCHAs that have been widely deployed on the Internet, one being Google's home design and the other acquired by Google (i.e. reCAPTCHA). With a minor change, our attack program also works well on the latest ReCAPTCHA version, which uses a new defence mechanism that was unknown to us when we designed our attack. This suggests that our attack works in a fundamental level. Our attack appears to be applicable to a whole family of text CAPTCHAs that build on top of the popular segmentation-resistant mechanism of "crowding character together" for security. Next, we propose a novel framework that guides the application of our well-tested security engineering methodology for evaluating CAPTCHA robustness, and we propose a new general principle for CAPTCHA design. },
  author = {El Ahmad, Ahmad S and Yan, Jeff and Tayara, Mohamad},
  institution = {School of Computer Science, Newcastle University, UK},
  interhash = {2d6bb0b3bad1f6a01c15e1bbd8bd7158},
  intrahash = {3516bc8c24b04f63927808e82824004d},
  month = may,
  title = {The Robustness of Google CAPTCHAs},
  url = {http://homepages.cs.ncl.ac.uk/jeff.yan/google.pdf},
  year = 2011
}

@inproceedings{ScWaP09,
  address = {Berlin},
  author = {Scholz, S.W. and Wagner, R.},
  booktitle = {{C}ooperation in {C}lassification and {D}ata {A}nalysis},
  editor = {Okada, A. and Imaizumi, T. and Bock, H.-H. and Gaul, W.},
  interhash = {f32bb4a5994c997c07b2adb377734975},
  intrahash = {7bc90804d782086dfd7906c89abb49c5},
  pages = {99 - 106},
  publisher = {Springer},
  title = {{C}lassification in {M}arketing {S}cience},
  year = 2009
}

@article{baerveldt1994influences,
  author = {Baerveldt, T. A. B.},
  interhash = {e341edae7edaaa4da9dd044b943912a2},
  intrahash = {0d6b995d6befb04a68aa8638d69887d8},
  journal = { Social Networks},
  pages = {213-232},
  title = {Influences on and from the segmentation of networks: hypotheses and tests},
  url = {http://www.prevention.psu.edu/events/documents/BaerveldtandSnijders1994_Influencesonandfromthesegmentation.pdf},
  volume = 16,
  year = 1994
}