S. Branson, C. Wah, B. Babenko, F. Schroff, P. Welinder, P. Perona, and S. Belongie, "Visual Recognition with Humans in the Loop", ECCV 2010. (slides) - [ Ryan ]
R. Farrell, O. Oza, N. Zhang, V. Morariu, T. Darrell, L. Davis, "Birdlets: Subordinate Categorization Using Volumetric Primitives and Pose-Normalized Appearance", ICCV 2011. (talk, slides were too big, email me) - [ Ryan ]
R. Salakhutdinov, A. Torralba, J. Tenenbaum, "Learning to Share Visual Appearance for Multiclass Object Detection", CVPR 2011. - [Jonathan Kummerfeld]
Bangpeng Yao*, Aditya Khosla*, and Li Fei-Fei, "Combining Randomization and Discrimination for Fine-Grained Image Categorization", CVPR 2011. (slides) - [Ning]
Additional Reading:
I. Biederman, S. Subramaniam, M. Bar, P. Kalocsai, and J. Fiser. Subordinate level object classification reexamined. Psychological Research, 62(2-3), 1999.
M.-E. Nilsback and A. Zisserman. "A Visual Vocabulary for Flower Classification", CVPR 2006.
R. Fergus, H. Bernal, Y. Weiss, and A. Torralba. Semantic Label Sharing for Learning with Many Categories. In ECCV, 2010.