GRAVITATION, ASTROPHYSICS 
Cosmological models of the Universe with reversal of time's arrow

349

On searches for new longrange forces

351

NUCLEI, PARTICLES, AND THEIR INTERACTION 
Calculation of the energy levels of μmesic molecules of hydrogen isotopes in the adiabatic reprentatlon of the threebody problem

353

Parity noneonservation in bismuth atoms and neutral weekinteraction currents

360

ATOMS. SPECTRA, RADIATION 
Feasibility of a lowtemperature γray laser

370

Decay of a weakly bound level in a monochromatic field

382

Interference of synchrotron radiation

388

Stark broadening of spectral lines of atoms in the field of multimode laser radiation

395

Polarization of photon echo produced by standingwave pulses

401

Electron bremsstrahlung in a dipole potential

406

Photon emission in collisions of a proton or positron with an atom

411

Theory of wave propagation in nonlinear inhomogeneous media

416

PLASMA, GASES 
Twodimensional Langmuir solitons and discreteness of the spectrum of the microwave radiation from a plasma at ω_{pe} < ω_{ce}

421

Theoretical study of the hydrodynamics of spherical targets taking the refraction of the laser radiation into account

425

Mechanism of generation of hot electrons in a laser plasma

432

Dynamics of the modulational instability of a broad spectrum of Langmuir waves

435

Expansion of collisionless plasma in a vacuum

441

SOLIDS, LIQUIDS 
Coherent Mössbauer scattering in birefringent crystals

448

Radiation from a vortex in a long Josephson junction placed In an alternating electromagnetic field

453

Critical thermal expansion of yttrium iron garnet

458

Magnetic "orderorder" and "orderalien disorder" phase transitions

460

Thermomechanical circulation effect in superfluid heliumII

468

Nonlinear polarizability tensor of an anisotropic medium

470

Beats due to superposition of "white" electromagnetic noise on spontaneous radiation from a resonant medium

474

Effect of pressure on the parameters of the energy spectrum of graphite

476

Some features of the cooperative behavior of paraelectric defects in strongly polarizable crystals

482

Boundary conditions for the electron distribution function on an imperfect surface

485

Dislocationstate spectrum in semiconductors

489

Theory of structural phase transitions in cyanides of alkali metals

495

Polaron effects and exchange interaction in magnetic dielectrics with JahnTeller ions

501

Ground states of a twodimensional electron in a periodic magnetic field

511

Nonlinearity of currentvoltage characteristic and magnetoresistance of the interface between the superconducting and normal phases

516

Temperature dependence of the conductivity of point junctions between a superconductor and a normal metal

520

Cooling of a system of nuclear spins in a semiconductor upon polarization of the electron polarization

526

Magnetic hyperfine interaction of ^{119}Sn impurity atoms in ordered alloys of iron with palladium and platinum. Radial dependence of the partial contributions to the magnetic hyperfine field

532

Nonlinear effect of uniaxial pressure in the EPR spectrum of a Cr^{0} JahnTeller center in Si

539

Exchangecorrelation energy in electronhole liquid with different electron distributions over the valleys in silicon

543

Surface oscillations of a Fermi liquid

549

Onedimensional periodic structure in a weak random potential

555

Effect of a strong magnetic field on the spinreorientation transition in DyCo_{5.3}

561

Interaction of diffusion modes in the theory of localization

568
