Hugh C. Williams. Some Public-Key Crypto-Functions as Intractable as Factorization. Cryptologia, 9(3):223-237, 1985. [doi]
@article{Williams85-1,
title = {Some Public-Key Crypto-Functions as Intractable as Factorization},
author = {Hugh C. Williams},
year = {1985},
doi = {10.1080/0161-118591859942},
url = {http://dx.doi.org/10.1080/0161-118591859942},
researchr = {https://researchr.org/publication/Williams85-1},
cites = {0},
citedby = {0},
journal = {Cryptologia},
volume = {9},
number = {3},
pages = {223-237},
}