Title	Average Gabor ? Wavelet Filter Feature Extraction Technique for Facial Expression Recognition
Author	Rohan Singh, Sanjay Jadhav, Shweta Sharma, Sandeep K. Gupta
Citation	Vol. 15  No. 5  pp. 102-104
Keywords	Facial Expression Recognition, Gesture, DWT, Gabor Filter

Title	A Review of Facial Expression Recognition Issues, Challenges, and Future Research Direction
Author	Yan Bowen, Azween Abdullah, Lorita Angeline, and S.H. Kok
Citation	Vol. 23  No. 1  pp. 125-139
Keywords	Facial expression recognition; image pre-processing; feature extraction; machine learning; deep learning