SINGH, Y. M. .; SHARMA, G. S. .; SALAM, O. .; SINHA, B. K. Understanding Chao (Biometrika, 1982) [Paper on ΠPS Sampling Schemes]. International Journal of Statistical Sciences , [S. l.], v. 24, n. 1, p. 133–154, 2024. DOI: 10.3329/ijss.v24i1.72032. Disponível em: https://banglajol.info/index.php/ijss/article/view/72032. Acesso em: 17 jul. 2024.