A.D. Bacher, H.E. Conzett, R. De Swiniarski, F.G. Resmini, T.A. Tombrello. Analysis of $^{3}$He + $^{4}$He elastic scattering between 18 and 70 MeV with the resonating group method of Brown and Tang.
Helvetica Physica Acta, 1979, 51, pp.680-684.
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