SINGH, H. P. .; RATHOUR, A. .; SOLANKI, R. S. . AN IMPROVEMENT OVER DIFFERENCE METHOD OF ESTIMATION OF POPULATION MEAN. Journal of Reliability and Statistical Studies, [S. l.], v. 6, n. 01, p. 35–46, 2013. Disponível em: https://journals.riverpublishers.com/index.php/JRSS/article/view/21885. Acesso em: 12 may. 2026.