Rita Cucchiara Costantino Grana Andrea Prati Roberto Vezzani Probabilistic posture classification for Human-behavior analysis. 42-54 2005 35 IEEE Transactions on Systems, Man, and Cybernetics, Part A 1 http://dx.doi.org/10.1109/TSMCA.2004.838501 db/journals/tsmc/tsmca35.html#CucchiaraGPV05