Improvement of modified ratio estimators using robust regression methods. - Tolga Zaman (Appl. Math. Comput., 2019)

Robust ratio-type estimators for finite population mean in simple random sampling: A simulation study. - Tolga Zaman; Hasan Bulut; Subhash Kumar Yadav (Concurr. Comput. Pract. Exp., 2022)

A new exponential estimators for analysis of COVID-19 risk. - Tolga Zaman; Murat Sagir; Mehmet Sahin (Concurr. Comput. Pract. Exp., 2022)

An improved class of robust ratio estimators by using the minimum covariance determinant estimation. - Hasan Bulut; Tolga Zaman (Commun. Stat. Simul. Comput., 2022)

Efficient Difference and Ratio-Type Imputation Methods under Ranked Set Sampling. - Shashi Bhushan; Anoop Kumar; Tolga Zaman; Aned Al Mutairi (Axioms, 2023)

An efficient Hartley-Ross type estimators of nonsensitive and sensitive variables using robust regression methods in sample surveys. - Tolga Zaman; Usman Shazad; Vinay Kumar Yadav (J. Comput. Appl. Math., 2024)

Improved memory-type ratio estimator for population mean in stratified random sampling under linear and non-linear cost functions. - Arun Pal; Rahul Varshney; Subhash Kumar Yadav; Tolga Zaman (Soft Comput., 2024)