[Authors] Egor Galkovskii, Alexander I. Nazarov [Title] A general trace formula for a regular differential operator on a segment with the last coefficient perturbated by a finite signed measure [AMS Subj-class] 34L05 General spectral theory [Abstract] We obtain the first-order trace formula for a regular differential operator on a segment perturbated by an operator of multiplication by signed measure. [Comments] LaTeX, Russian, 20 pp. [Contact e-mail] al.il.nazarov@gmail.com