Allini, E. N., Skórski, M., Petura, O., Bernard, F., Laban, M., &; Fischer, V. (2018). Evaluation and monitoring of free running oscillators serving as source of randomness. IACR Transactions on Cryptographic Hardware and Embedded Systems. International Association for Cryptologic Research.https://doi.org/10.13154/tches.v2018.i3.214-242 
LibreCat: https://research-explorer.ista.ac.at/record/10286
DOI: 10.13154/tches.v2018.i3.214-242