1. E. Bodenstedt:Ann. der Phys.,15, 35 (1954).
2. A. A. Kolomenskij andL. L. Sabsovič:O prohoždenii čerez kritičeskuju energiju v uskoritele s žëstkoj fokusirovkoj (On the passage through the critical energy in the strongfocusing accelerator, unpublished Report, 1953).
3. K. Johnsen:Phase Oscillations and Transition Energy Problems (Lecture presented at the Conference on the Alternating-Gradient Proton Synchrotron, Geneva, 1953).
4. N. M. Blachman:Rev. Sci. Instr.,21, 908 (1950).
5. V. V. Vladimirskij andK. I. Tarasov:On the Possibility of eliminating the critical energy in the strong-focusing accelerator (Paper presented to the International Conference on the Peaceful Uses of Atomic Energy, Geneva, 1955).