PERTURBATION THEORY FOR RETARDED-TEMPERATURE GREEN'S FUNCTIONS. A SYSTEM OF FERMI PARTICLES WITH DIRECT INTERACTION.

GREEN'S FUNCTIONS FOR QUANTUM FERMI SYSTEMS OF COLLIDING CHARGED PARTICLES.

THEORY OF FINITE SYSTEMS OF PARTICLES. I. THE GREEN FUNCTION

NONLOCAL THEORY OF THE INTERACTION BETWEEN FERMI PARTICLES

AN APPLICATION OF THE PATH INTEGRALS METHOD IN THE GREEN'S FUNCTION THEORY OF THE SYSTEMS OF INTERACTING PARTICLES.

GREEN'S FUNCTIONS IN A FERMI SYSTEM AT T = 0

ON THE USE OF GREEN FUNCTIONS IN PERTURBATION THEORY. PART II