Grewal, Inderjit Singh, Mohan Lal Bansal, and Sarjinder Singh. “Estimation of Population Mean of a Stigmatized Quantitative Variable Using Double Sampling”. Statistica 63, no. 1 (January 1, 2003): 79–88. Accessed April 27, 2024. https://rivista-statistica.unibo.it/article/view/1308.