G. Hofer, and K. Richmond. Proceedings of the 11th Annual Conference of the International Speech Communication Association (INTERSPEECH), page 454-457. Makuhari, Japan, (September 2010)
M. Kwiatkowska, G. Norman, and D. Parker. Computer Performance Evaluation: Modelling Techniques and Tools, page 200--204. Berlin, Heidelberg, Springer Berlin Heidelberg, (2002)