1. Randomized response trials: a unified approach for qualitative data;Arnab;Comm. Statist. Theory and Methods,1996
2. Optional randomized response techniques for complex survey designs;Arnab;Biometrical Journal,2004
3. On unbiased variance estimation with various multi-stage sampling strategies;Chaudhuri;Sankhya¯, B,1982
4. Randomized Response: Theory and Techniques;Chaudhuri,1988
5. Central Statistical Office (CSO, 2005). The Botswana Aids Impact Survey II 2004.