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Patronis, N.; Assimakopoulos, P. A.; Dababneh, S.; Heil, M.; Kaeppeler, F.; Karamanis, D.; Koehler, P. E.; Plag, R. The $^{135}$Cs(n,$\gamma$) Cross Section at 30 and 500 KeV. HNPS Adv Nucl Phys 2021, 12, 71-81.