Graphemic-phonetic diachronic linguistic invariance of the frequency and of the Index of Coincidence as cryptanalytic tools.
PLoS One. 2019 Mar 19;14(3):e0213710. doi: 10.1371/journal.pone.0213710. eCollection 2019.
PLoS One. 2019.
PMID: 30889191
Free PMC article.