Time-frequency and time-scale techniques for the classification of native and bioprosthetic heart valve sounds. - P. M. Bentley; Peter M. Grant; J. T. E. McDonnell (IEEE Trans. Biomed. Eng., 1998)

Warp2: A Method of Email and Messaging with Encrypted Addressing and Headers. - H. Bjorgvinsdottir; P. M. Bentley (CoRR, 2014)