GRAVITATION, ASTROPHYSICS 
Quantum theory of gaugeinvariant cosmological perturbations

1297

NUCLEI, PARTICLES, AND THEIR INTERACTION 
Manifestation of quantumchromodynamic coherence in deep inelastic scattering

1303

Processes induced by a charged particle in an electric field, and the Unruh heatbath concept

1313

Photon emission by a neutron in a planewave field

1322

Chiral photon current and its anomaly in a gravitational field

1326

ATOMS, SPECTRA, RADIATION 
Zel'dovich effect in atomic and nuclear physics

1333

Transverse channeling and a freeelectron laser utilizing a strong standing wave

1342

Stimulated bremsstrahlung effect in the scattering of electrons by atoms subject to the polarization of a target

1346

Contribution to the theory of polarizability of macroscopic bodies

1351

Parametric xray emission by crystals irradiated by an ultrasound wave

1358

Nonlinear strong absorption wave in an optically bistable semiconductor

1363

Nonlinear optical activity of a resonant gaseous medium

1370

PLASMA, GASES 
Emission from a stationary spherical "corona" produced by beams of heavy ions

1376

Nonlinear interactions of waves in an inhomogeneous plasma

1380

Kolmogorov weak turbulence spectra of an inhomogeneous magnetized plasma

1386

LIQUIDS 
What energy flux is carried away by the Kolmogorov weak turbulence spectrum?

1393

The stability of nonhomogeneous states and path integrals

1398

Shortrange order in liquid deuterium under pressure

1403

Fluctuation absorption of sound in compensated cholesterics

1407

Contribution to the theory of inelastic neutron scattering in superfluid helium

1409

SOLIDS 
Spin echo in magnetics with a quadrupolesplit NMR spectrum

1413

Electric current due to excitations in the Hubbard model

1416

Theory of an absolute negative photoconductivity of ruby

1423

Quantum size effects in luminescence of thin lead sulfide films and PbSEuS superlattices

1431

Exact solution of twodimensional Z_{N}invariant selfdual models near the critical point

1436

Weaklocalization theory: role of higher derivatives in the nonlinear sigmamodel

1441

Secondharmonic generation in twodimensional systems without inversion centers

1446

Onedlmenslonal crystal in the field of two potentials with Incommensurate periods

1450

Excitons bound to phosphorus impurity atoms in germanlum

1453

Effect of correlations of JahnTeller distortions on the magnetostrictlon of the virtual elastic TmPO_{4}

1460

Cluster spin glass in a chromiumiron system

1462

Crystal structure of the superconducting compound LaBa_{2}Cu_{3}O_{7}

1465

Model of macroscopically inhomogeneous mixtures of a perfect conductor and an insulator near the mobility edge

1467

Density of states in ntype inversion layers at the (100) surface of Si in a quantizing magnetic field

1471

Properties of Josephson junctions with amorphoussilicon interlayers

1478

On the dynamics of a particle in a twowell potential

1486

New method of finding dynamic solutions in the Peierls model

1492

Macroscopic theory of superconductors with small coherence length

1499

Special features of the currentvoltage characteristic of warm twodimensional electrons

1511
