@other{https://resolver.caltech.edu/CaltechTHESIS:10052010-115540388,
    title = "Unsupervised learning of models for object recognition",
    url = "https://resolver.caltech.edu/CaltechTHESIS:10052010-115540388",
    id = "record",
    doi = "10.7907/ec32-c786"
}