VARIATIONAL UPPER AND LOWER BOUNDS ON TRANSITION AMPLITUDES.

TRANSITION AMPLITUDES AND PROBABILITIES

TRANSITION AMPLITUDES IN CONTINUOUS SPECTRUM FOR MANY-PARTICLE SYSTEMS.

CANONICAL COMMUTATION RELATIONS AND ASYMPTOTIC BEHAVIOR OF THE TRANSITION AMPLITUDES

DUAL AMPLITUDES AND BASIC ASSUMPTIONS. [PART] I.

PRELIMINARIES: PROBABILITIES VERSUS AMPLITUDES

VARIATIONAL PRINCIPLE FOR THE INTENSITY OF FORBIDDEN TRANSITIONS.