@article{NSR1985BE56, author="V. B. {Belyaev} and V. V. {Pupyshev} and S. A. {Rakityansky}", title="Scattering Lengths for $\pi \pm$ $^{3}$H, $\pi \pm$ $^{3}$He Scatterings and Mass Differences of Pions, Nucleons and the Nuclei", journal="Yad.Fiz.", year=1985, volume="42", pages="1104" }
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