Adhikary, Arun Kumar2013-11-082013-11-081991Communication in Statistics Theory and Methods, v 20, no 7, p 2291-2297http://hdl.handle.net/10263/5662enFinite populationHorvitz -Thompson estimatorMarkov process modelVarying probability samplingOn optimality of the Horvitz -Thompson estimator under a Markov process modelArticle