1. On the second-order asymptotic efficiencies of estimators;Akahira,1976
2. On the second-order asymptotic efficiency of estimators in multiparameter cases;Akahira;Rep. Univ. Electro-Comm.,1976
3. On Fisher's bound for asymptotic variances;Bahadur;Ann. Math. Statist.,1964
4. On the validity of the formal Edgeworth expansion;Bhattacharya,1977