1.标题:Maximum likelihood from incomplete data via the EM algorithm
作者:A. P. Dempster, N. M. Laird and D. B. Rubin
出版社:Journal of the Royal Statistical Society. Series B (Methodological), Vol. 39, No. 1 (1977), pp. 1-38 (article consists of 38 pages)
电子链接:http://www.jstor.org/pss/2984875
2.标题:Identification in paramertric models
作者:Thomas J. Rothenberg
出版社:Econometrica, Vol. 39, No. 3 (May, 1971), pp. 577-591 (article consists of 15 pages)
电子链接:http://www.jstor.org/pss/1913267
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