Nikil S. Jayant, Richard V. Cox, Barbara J. McDermott, A. M. Quinn. Analog scramblers for speech based on sequential permutations in time and frequency. Bell Syst. Tech. J., 62(1):25-46, 1983. [doi]
@article{JayantCMQ83,
title = {Analog scramblers for speech based on sequential permutations in time and frequency},
author = {Nikil S. Jayant and Richard V. Cox and Barbara J. McDermott and A. M. Quinn},
year = {1983},
doi = {10.1002/j.1538-7305.1983.tb04377.x},
url = {https://doi.org/10.1002/j.1538-7305.1983.tb04377.x},
researchr = {https://researchr.org/publication/JayantCMQ83},
cites = {0},
citedby = {0},
journal = {Bell Syst. Tech. J.},
volume = {62},
number = {1},
pages = {25-46},
}