New measurement of exotic decay of by emission A. Guglielmetti, R. Bonetti, G. Ardisson, V. Barci, T. Giles, M. Hussonnois, J.F. Le Du, C. Le Naour, V.L. Mikheev, A.L. Pasinetti, H.L. Ravn, S.P. Tretyakova and D. TrubertEur. Phys. J. A, 12 4 (2001) 383-386DOI: https://doi.org/10.1007/s10050-001-8661-5