Estimation of Parameters in the Multivariate Normal Distribution with Missing Observations
Ronald Raymond Hocking, Wm. B. Smith · Journal of the American Statistical Association · 1968
R. R. Hocking, Wm. B. Smith, Estimation of Parameters in the Multivariate Normal Distribution with Missing Observations, Journal of the American Statistical Association, Vol. 63, No. 321 (Mar., 1968), pp. 159-173