GRAVITATION, ASTROPHYSICS 
On the gravitational field of a massless particle

575

The interaction of short gravitational waves with electromagnetic waves in arbitrary external electromagnetic fields

579

NUCLEI, PARTICLES, AND THEIR INTERACTIONS 
On the theory of precession of the polarization vector of μ^{} mesons in munucleonic atoms

586

The stability of the polarization of colliding beams

592

ATOMS, SPECTRA, RADIATION 
Nonlinear interaction between differently polarized waves traveling in opposite directions in a ring laser

596

Radiation from an atom located in an external electromagnetic field

601

Saturated fluctuations in the laser radiation intensity in a turbulent medium

605

Relaxation of the vibrational energy of the (00^{0}1) level of the CO_{2} molecule

610

Changes in Cerenkov radiation caused by an external field

615

Noise spectrum of spontaneous emission

620

Calculations of the Stark effect in hydrogen atoms by using the dynamical symmetry O(2,2)O(2)

627

Differencefrequency excitation in nonlinear optics and the conditions for Cerenkovradiation emission

633

Twophoton absorption in the microwave band

638

PLASMA, GASES 
Relativistic generalization of the Darwin Lagrangian

641

A modified Kortewegde Vries equation electrohydrodynamics

643

Interaction of a highintensity relativistic electron beam with plasma in a magnetic field

647

Evolutionality of magnetohydrodynamic discontinuities with allowance for dissipative waves

654

Effect of a magnetic field on heat transport in tenuous molecular gases

657

On the theory of relativisticelectronbeam injection into a spatially confined plasma

661

SOLIDS, LIQUIDS 
Possible application of the nuclear γresonance technique to the investigation of the elastic properties of liquids

665

Experimental investigation of the "Hall" components of the magnetoresistance tensor of bismuth

667

Highfrequency breakdown in ptype lnSb

671

Theory of the resistivity and magnetoresistance of metals at low temperatures

673

Thermoelectric effects in superconductors

680

Double nuclear magnetic resonance in a twospin system in a solid

686

Shapes of Mössbauer spectra in the rapidrelaxation limit

690

Mössbauer effect in superconducting films of tin evaporated jointly with a tin complex of etioporphyrin

697

Concerning one gyromagnetic effect in a liquid paramagnet

701

lnvestigation of the magnetic scattering in a superconductor by the tunneleffect method

705

Calculation of critical indices for zerogap semiconductors

709

Nonlinear size effect in bismuth

717

lnvestigation of the properties of the dislocation EPR spectra in silicon

721

Theory of the bound states of phonons with impurity centers

726

Temperature dependence of the probability of scattering of small groups of electrons in tin and indium

732
