List of Articles Umpei Nagashima Article 1 - Semiempirical investigations on the stabilization energies and ionic hydrogen-bonded structures of F−(H2O)n and Cl−(H2O)n (n = 1–4) clusters 10.1186/2251-7235-7-7 Qi Wang Kimichi Suzuki Umpei Nagashima Masanori Tachikawa Shiwei Yan Journal of Theoretical and Applied Physics , Issue 1 , Year , Winter 2014