Abdolali, F., Seyed Salehi, S. A.. “Improving Pose Manifold and Virtual Images Using Bidirectional Neural Networks in Face Recognition Using Single Image per Person.” Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran, vol. 9, no. 1, 2011, pp. 14-20.