Towards a field theoretic understanding of NN → NNπV. Lensky, V. Baru, J. Haidenbauer, C. Hanhart, A. E. Kudryavtsev and U. -G. MeißnerEur. Phys. J. A, 27 1 (2006) 37-45DOI: https://doi.org/10.1140/epja/i2006-10002-4