Computer algebra generating related 2nd order linear differential equation / L.M.Berkovich,V.P.Gerdt,Z.T.Kostova,M.L.Nechaevsky, 1990. - 14 p. - Текст : непосредственный.
Algebraic-numeric calculations of proton trajectories in bending magnets of synchrotron accelerator / V.P.Gerdt,Z.T.Kostova,N.A.Kostov,I.P.Yudin, 1989. - 12 p. - Текст : непосредственный.