1. www.law.cornell.edu/uscode/text/13 Sec. 9Mel.
2. ec.europa.eu/eurostat/web/research‐methodology/statistical‐Confidentiality
3. On the question of statistical confidentiality;Fellegi I.P.;J. Am. Stat. Assoc.,1972
4. Suppression methodology and statistical disclosure control;Cox L.H.;J. Am. Stat. Assoc.,1980