GRAVITATION, ASTROPHYSICS 
The isotropization of homogeneous cosmological models

739

Singularities of the cosmological model of the Bianchi IX type according to the qualitative theory of differential equations

747

ATOMS, SPECTRA, RADIATION 
Spectroscopy of twoquantum transitions in a gas near resonance

756

Spatial field and intensity correlation functions of laser radiation

764

Spectroscopy of vapors of lowvolatility compounds supercooled in a supersonic stream

772

Frequency tunable generation of giant pulses in spectrally inhomogeneous media

778

Scattering of an electron in an electromagnetic wave and in a homogeneous magnetic field

784

On the problem of the nucleartransition γlaser

787

PLASMA, GASES 
lnvestigation of equilibrium and stability of selfcontracted discharges in an optically dense plasma

794

The eikonal method in the threebody problem

801

Collisionless damping of forced nonlinear plasma oscillations

805

On the nonlinear theory of the beamplasma instability

809

Parametric instabilities in a plasma containing two types of ions

813

Nonlinear oscillations of an unstable plasma

820

Interaction between solitons in a stable medium

823

Structure of shock waves

829

Theory of the anomalous skin effects in a plasma with a diffuse boundary

835

SOLIDS, LIQUIDS 
Critical velocities for vortex formation by an oscillating disc in helium II and relaxation processes during its rotation

844

Experimental investigation of some peculiarities of the equation of state of heptane near the critical point

848

Thermal conductivity and the temperature dependences of the energy gaps of niobium samples containing large amounts of impurity atoms

852

Nuclear relaxation in SrF_{2}

857

lnvestigation of the superparamagnetic properties of ultrafine iron particles by Mössbauer spectroscopy

859

Anisotropy of the probability of electron scattering by phonons on the Fermi surface of copper

864

Effect of high uniform pressure and residual stress on the superconductivity of alloys of the V_{3}(Si_{1x}Ge_{x}) system

870

Shape of the electron Fermi surface of bismuth

875

Magnetocaloric effect in a superparamagnet

881

Electronphonon interaction and cyclotron resonance in lead

883

Magnetic birefringence of light in antiferromagnetic transitionmetal fluorides

890

On the theory of the inelastic tunnel effect in normal metals

897

BoseEinstein condensation of dipoleactive excitons and photons

902

Phonon transition radiation

909

Electron drag of elastic field sources and the conductivity of metals

914

Measurement of the relaxation time on acceleration of vessels with helium II and superfluidity in pulsars

918

High frequency current states in small size superconductors

922

Surface resistance of cadmium in a magnetic field

929

The resistance of thin metallic samples

937

On the superfluidity of the Fermi component in a FermiBose gas and in He^{3}He^{4} solutions

940

Fluctuation theory of the twodimensional mixed state in type 1 superconductors

942

On tunneling of electron pairs in a sound field in superconductors

950
