Robustness to missing observation and optimalities of response surface designs with regular and complex structure. - Humera Hayat; Atif Akbar; Tanvir Ahmad; Sajjad Haider Bhatti; Muhammad Imdad Ullah (Commun. Stat. Simul. Comput., 2023)

Variance estimation for non-parametric regression model in systematic sampling under heteroscedastic errors: a simulation study. - Sana Wahid; Javaria Ahmad Khan; Atif Akbar (Int. J. Math. Model. Numer. Optimisation, 2025)