1. Laplace approximations to posterior moments and marginals on circles, spheres, and cylinders;Bagchi;Can. J. Statist,1991
2. On a formula for the distribution of the maximum likelihood estimator;Barndorff-Nielsen;Biometrika,1983
3. Edgeworth and saddlepoint approximations with statistical applications (with discussion);Barndorff-Nielsen;J. R. Statist. Soc. B,1979