2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18156We study the effect of site diagonal disorder on the pairing amplitude by a perturbation method. Using an extended Hubbard model with the intersite attraction we analyze fluctuations of order parameter in presence of non-magnetic disorder and discuss the instability of various solutions with p-wave paring.4 pages, 1 figure, Acta Physica Polonica B (accepted)Superconductivitytext