@InProceedings{Fergus03,
	author = "Fergus, R. and Perona, P. and Zisserman, A.",
        title = "Object Class Recognition by Unsupervised Scale-Invariant Learning",
        booktitle = "Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition",
	pages = "264--271",
        volume = "2",	
        year = 2003,
        month = jun,
        url = "http://www.robots.ox.ac.uk/~vgg"                  
}