Ibragimov, I. A. Statistical estimation : asymptotic theory / I.A. Ibragimov, R.Z. Has'minskii translated by Samuel Kotz. - New York: Springer-Verlag, 1981. - 403p.; 25 cm. Translation of Asimptoticheskaia teoriia otsenivaniia. engrus. Subjects--Topical Terms: Asymptotic expansions.