I. Ignatov, M. Iliev, T. Popova, G. Gluhchev, P. Gramatikov, and P. Vassileva, “Meteorological Data and Spectral Analyses of Non-Equilibrium Processes in Water during the Total Solar Eclipse of 11.08.1999 in Bulgaria”, Ukr. J. Phys., vol. 69, no. 2, p. 96, Mar. 2024.