Estimation of mean using double sampling the non-respondents with known and unknown variance. - Raghaw Raman Sinha; Vinod Kumar (Int. J. Comput. Sci. Math., 2015)

Estimation of population mean under probability proportional to size sampling with and without measurement errors. - Raghaw Raman Sinha; Bharti Khanna (Concurr. Comput. Pract. Exp., 2022)