R. K. Aggarwal and M. Dave, “Implementing a Speech Recognition System Interface for Indian Language,” Proceedings of the IJCNLP-2008 Workshop on NLP for Less Privileged Languages, Hyderabad, January 2008, pp. 105-112.
 R. K. Aggarwal and M. Dave, “Fitness Evaluation of Gaussian Mixtures in Hindi Speech Recognition System,” 2010 First International Conference on Integrated Intelligent Computing, Bangalore, 5-7 August 2010, pp. 177- 183. doi:10.1109/ICIIC.2010.13
 K. Malhotra and A. Khosla, “Automatic Identification of Gender & Accent in Spoken Hindi Utterances with Regional Indian Accents,” IEEE Spoken Language Technology Workshop, Goa, 15-19 December 2008, pp. 309- 312.
 B. A. Q. Al-Qatab and R. N. Ainon, “Arabic Speech Re- cognition Using Hidden Markov Model Toolkit (HTK),” International Symposium in Information Technology, Kuala Lumpur, 15-17 June 2011, pp. 557-562.
 P. G. Deivapalan and H. A. Murthy, “A Syllable-Based Isolated Word Recognizer for Tamil Handling OOV Words,” The National Conference on Communications, Indian Institute of Technology Bombay, 1-3 February 2008, pp. 267-271.
 G. Anumanchipalli, R. Chitturi, S. Joshi, R. Kumar, S. P. Singh, R. N. V. Sitaram and S. P. Kishore, “Development of Indian Language Speech Databases for Large Vocabulary Speech Recognition Systems,” Proceedings of International Conference on Speech and Computer (SPECOM), Patras, October 2005.
 A. Stolcke, “SRILM—An Extensible Language Modeling Toolkit,” Proceedings of the 7th International Conference on Spoken Language Processing, 2002, pp. 901-904. http://www.speech.sri.com/
 M. Benzeghiba, R. De Mori, O. Deroo, S. Dupont, T. Erbes, D. Jouvet, L. Fissore, P. Laface, A. Mertins, C. Ris, R. Rose, V. Tyagi and C. Wellekens, “Automatic Speech Recognition and Speech Variability: A Review,” Speech Communication, Vol. 49, No. 10-11, 2007, pp. 763-786. doi:10.1016/j.specom.2007.02.006
 T. Herbig, F. Gerl, W. Minker and R. Haeb-Umbach, “Adaptive Systems for Unsupervised Speaker Tracking and Speech Recognition,” Evolving Systems, Vol. 2, No. 3, 2011, pp. 199-214. doi:10.1007/s12530-011-9034-1
 Steve Young, et al., “The HTK Book,” http://htk.eng.cam.ac.uk/docs/docs.shtml