b. Editorial “Physics Uspekhi is 90 years old” Phys. Usp. 51 1–1 (2008)

Reviews of topical problems

V.F. Gantmakher, V.T. Dolgopolov “Localized-delocalized electron quantum phase transitions” Phys. Usp. 51 3–22 (2008)

Yu.A. Izyumov, E.Z. Kurmaev “Materials with strong electron correlations” Phys. Usp. 51 23–56 (2008)

V.V. Aristov, L.G. Shabel’nikov “Recent advances in X-ray refractive optics” Phys. Usp. 51 57–77 (2008)

Instruments and methods of investigation

G.A. Mesyats “Electron emission from ferroelectric plasma cathodes” Phys. Usp. 51 79–100 (2008)

Letters to the editors

V.N. Datsko, A.A. Kopylov “On surface electromagnetic waves” Phys. Usp. 51 101–102 (2008)

Bibliography

E.V. Zakharova “New books on physics and related sciences” Phys. Usp. 51 103–105 (2008)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet” Phys. Usp. 51 107–108 (2008)