MOTION OF A PHOTON IN GRAVITATIONAL-FIELD Article EPIKHIN E.N., MITSKIEVIC N.V. Acta Physica Polonica B. Vol. 7. 1976. P. 543-552
ONE-PARTICLE DISTRIBUTION FUNCTIONS AND THERMODYNAMICS OF CRYSTALS WITH MANY-BODY FORCES .3. Article ZUBOV V.I. Annalen der Physik. Vol. 33. 1976. P. 103-112