Barndorff-Nielsen, O. E. (1974). On Μ-ancillarity and Μ-sufficiency. In O. E. Barndorff-Nielsen, P. Blæsild & G. Schou (Eds.), Proceedings of Conference on Foundational Questions in Statistical Inference: Århus, May 7-12, 1973 (pp. 308-311). Department of Mathematical Sciences, Aarhus University.