#### Volume 15, issue 2 (2015)

 1 M F Atiyah, E Rees, Vector bundles on projective $3$–space, Invent. Math. 35 (1976) 131 MR0419852 2 A Borel, Sur la cohomologie des espaces fibrés principaux et des espaces homogènes de groupes de Lie compacts, Ann. of Math. 57 (1953) 115 MR0051508 3 V M Buchstaber, T E Panov, Torus actions and their applications in topology and combinatorics, University Lecture Series 24, Amer. Math. Soc. (2002) MR1897064 4 S Choi, M Masuda, D Y Suh, Topological classification of generalized Bott towers, Trans. Amer. Math. Soc. 362 (2010) 1097 MR2551516 5 S Choi, M Masuda, D Y Suh, Rigidity problems in toric topology: A survey, Tr. Mat. Inst. Steklova 275 (2011) 188 MR2962979 6 Y Fukukawa, H Ishida, M Masuda, The cohomology ring of the GKM graph of a flag manifold of classical type, Kyoto J. Math. 54 (2014) 653 MR3263556 7 S Kuroki, D Y Suh, Complex projective towers and their cohomological rigidity up to dimension six, arXiv:1203.4403 8 M Mimura, H Toda, Homotopy groups of $\mathrm{SU}(3)$, $\mathrm{SU}(4)$ and $\mathrm{Sp}(2)$, J. Math. Kyoto Univ. 3 (1963) 217 MR0169242