Quantum crystals

Phase separations kinetics of 3He-4He mixtures	Scientific results
Supersolidity of quantum crystals	Scientific results
bcc-hcp phase transition in solid helium	Scientific results

Superfluidity of 4He and 3He-4He solutions

Electrical activity of He II	Scientific results
Quantum turbulence	Scientific results
Thermodynamic properties and kinetic processes	Scientific results

Low-dimensional charge systems localized over liquid helium

2D electron system localized over liquid helium	Scientific results
Surface electrons systems in helium on polished substrates	Scientific results

Low-temperature technique. New developments

• Refrigerators for ultralow temperatures
• Low-temperature thermometry
• NMR technique
• Acoustic methods
• Precise barometry
• The Sommer-Tanner capacitive method of conductivity measurements