中国科学院数学与系统科学研究院期刊网
Involutions Fixing the Disjiont union of Projectoin Space F=∪_(i=1)~m RP_i(1)×HP_i(n)
Xiang Hong LI(1), Gui Wen LV(1
Acta Mathematica Sinica, Chinese Series . 2006, (2): 265 -270 .  DOI: 10.12386/A2006sxxb0034