@article {IOPORT.50358124,
    author       = {Busso, Carlos and Deng, Zhigang and Grimm, Michael and Neumann, Ulrich and Narayanan, Shrikanth},
    title        = {Rigid head motion in expressive speech animation: analysis and synthesis},
    year         = {2007},
    journal      = {IEEE Transactions on Audio, Speech & Language Processing},
    volume       = {15},
    number       = {3},
    pages        = {1075-1086},
    doi          = {10.1109/TASL.2006.885910},
    identifier   = {50358124},
}