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documentstyle[12pt]{article} \begin{document} \centerline{\bf {STRUCTURE AND STAR FORMATION}} \centerline{\bf {IN CIRCUMNUCLEAR REGIONS OF SPIRAL GALAXIES}} \bigskip \bigskip \begin{abstract} Photometric and kinematic properties of inner regions of spiral galaxies are considered. It is shown that the fast rotation of nuclear gaseous disks makes them gravitationally stable or marginally unstable. ... Nuclear disks are usually distinguished by high angular velocity of gas. ...