Fergus, R., Perona, P., & Zisserman, A. (2005). A sparse object category model for efficient learning and exhaustive recognition. IEEE.

Fergus, R., P. Perona, and A. Zisserman. A Sparse Object Category Model for Efficient Learning and Exhaustive Recognition. IEEE, 2005.

Fergus, R., et al. A Sparse Object Category Model for Efficient Learning and Exhaustive Recognition. IEEE, 2005.