Dennie Van Tassel. Cryptographic techniques for computers: Substitution methods. Inf. Process. Manage., 6(2):241-249, 1970. [doi]
@article{Tassel70-0,
title = {Cryptographic techniques for computers: Substitution methods},
author = {Dennie Van Tassel},
year = {1970},
doi = {10.1016/0020-0271(70)90064-1},
url = {http://dx.doi.org/10.1016/0020-0271(70)90064-1},
researchr = {https://researchr.org/publication/Tassel70-0},
cites = {0},
citedby = {0},
journal = {Inf. Process. Manage.},
volume = {6},
number = {2},
pages = {241-249},
}