1. A. M. Zvyagintsev and G. M. Krucheniskii, “Connections Between Total Ozone in Northern Hemisphere Midlatitudes and the North Atlantic Oscillation,” Meteorol. Gidrol., No. 7 (1996) [Russ. Meteorol. Hydrol., No. 7 (1996)].
2. A. M. Zvyagintsev and G. M. Krucheniskii, “On the Relations of Total Ozone Content in the Northern Hemisphere and Atmospheric Oscillations,” Izv. Akad. Nauk, Fiz. Atmos. Okeana, No. 4, 39 (2003) [Izv., Atmos. Oceanic Phys., No. 4, 39 (2003)].
3. D. W. J. Thompson, J. M. Wallace, and G. C. Hegel, “Annual Modes in the Extratropical Circulation. Part II: Trends,” J. Climate, No. 5, 13 (2000).