Vetter, T Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society; Max Planck Institute for Biological Cybernetics, Max Planck Society;
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=598230 (Publisher version)
Vetter, T., & Poggio, T. (1997). Linear object classes and image synthesis from a single example image. IEEE Transactions on Pattern Analysis and Machine Intelligence, 19(7), 733-742. doi:10.1109/34.598230.