Nonlinear Hydrogen Bond Network in Small Water Clusters: Combining NMR, DFT, FT-IR, and EIS Research. - Ignat Ignatov; Yordan G. Marinov; Paunka Vassileva; Georgi Gluhchev; Ludmila A. Pesotskaya; Ivan P. Jordanov; Mario T. Iliev (Symmetry, 2025)