Do Quang, T., Nguyen, V.P., Nguyen, M.H., Nguyen Thi, H.N., Tran Duy, Q.N., Tran Viet, N.H. and Vo, L.U. 2023. Imaginary part of microscopic optical potential at negative energies. Hue University Journal of Science: Natural Science. 132, 1B (Jun. 2023), 133-137. DOI:https://doi.org/10.26459/hueunijns.v132i1B.6871.