The Choice of Sample Size in Estimating Entropy According to a Strtified Sampling. - María Angeles Gil; Covadonga Caso (IPMU, 1988)

Estimating income inequality in the stratified sampling from complete data. I. The unbiased estimation and applications. - Covadonga Caso; María Angeles Gil (Kybernetika, 1989)

Estimating income inequality in the stratified sampling from complete data. II. The asymptotic behaviour and the choice of sample size. - Covadonga Caso; María Angeles Gil (Kybernetika, 1989)