Study of thermodynamic fluctuations of two-dimensional multiferroic systems using the renormalized Gaussian approachM. G. E. Tongue, A. J. Fotue, R. M. Keumo Tsiaze and L. C. FaiEur. Phys. J. Plus, 136 2 (2021) 199DOI: https://doi.org/10.1140/epjp/s13360-021-01178-5