http://papers.nips.cc/paper/2292-clustering-with-the-fisher-score.pdf (Publisher version)
Tsuda, K., Kawanabe, M., & Müller, K.-R. (2003). Clustering with the Fisher score. In S. Becker, S. Thrun, & K. Obermayer (Eds.), Advances in Neural Information Processing Systems 15 (pp. 729-736). Cambridge, MA, USA: MIT Press.