Precision calculation of γd↦πnn within chiral perturbation theoryV. Lensky, V. Baru, J. Haidenbauer, C. Hanhart, A. Kudryavtsev and U. -G. MeißnerEur. Phys. J. A, 26 1 (2005) 107-123DOI: https://doi.org/10.1140/epja/i2005-10154-7