First identification of excited states in
C. Andreoiu, M. Axiotis, G. de Angelis, J. Ekman, C. Fahlander, E. Farnea, A. Gadea, T. Kröll, S.M. Lenzi, N. Mărginean, T. Martinez, M.N. Mineva, C. Rossi Alvarez, D. Rudolph and C.A. Ur
Eur. Phys. J. A, 15 4 (2002) 459-462
DOI: https://doi.org/10.1140/epja/i2002-10044-6