DEEPAK MAJHI; UTTAM KUMAR PRASAD. Improvement of Exponential Chain-Type Estimators of Population Mean Under Double Sampling. International Journal of Mathematics And its Applications, [S. l.], v. 14, n. 2, p. 73–81, 2026. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1643. Acesso em: 15 aug. 2026.