Quality Assessment: Hu, Y. and Loizou, P. (2008). “Evaluation of objective quality measures for speech enhancement,” IEEE Transactions on Speech and Audio Processing, 16(1), 229-238.
Intelligibility Assessment: Ma, J., Hu, Y. and Loizou, P. (2009). "Objective measures for predicting speech intelligibility in noisy conditions based on new band-importance functions", Journal of the Acoustical Society of America, 125(5), 3387-3405.
Lu, Y. and Loizou, P. (2011). "Estimators of The Magnitude-Squared Spectrum and Methods for Incorporating SNR Uncertainty," IEEE Trans. Audio, Speech, Language Processing,19(5), 1123-1137.[MATLAB code] [pdf].
Li, N. and Loizou, P. (2008). “Factors influencing intelligibility of ideal binary-masked speech: Implications for noise reduction,” Journal of Acoustical Society of America, 123(3), 1673–1682. [pdf]
Loizou, P. and Kim, G. (2011). "Reasons why Current Speech-Enhancement Algorithms do not Improve Speech Intelligibility and Suggested Solutions," IEEE Trans. Audio, Speech, Language Processing, 19(1), 47-56. [pdf]