John Hogden Philip Rubin Erik McDermott Shigeru Katagiri Louis Goldstein Inverting mappings from smooth paths through R<sup>n</sup> to paths through R<sup>m</sup>: A technique applied to recovering articulation from acoustics. 361-383 2007 49 Speech Communication 5 http://dx.doi.org/10.1016/j.specom.2007.02.008 db/journals/speech/speech49.html#HogdenRMKG07