Key points are not available for this paper at this time.
B. S. Everitt, Maximum Likelihood Estimation of the Parameters in a Mixture of Two Univariate Normal Distributions; A Comparison of Different Algorithms, Journal of the Royal Statistical Society. Series D (The Statistician), Vol. 33, No. 2 (Jun., 1984), pp. 205-215
B. S. Everitt (Fri,) studied this question.