7Kuzel S, Hruby M, Cigler P, et al. Mechanism of physiologi- cal effect of titanium leaf sprays on plants grown on soil [ J ]. Biological Trace Element Research, 2003, 91 : 179 - 189.
8Collins J M, Uppal R, Incarvito C D, et al. Titanium citrate speciation and structure under environmentally and biologically relevant conditions [ J ]. Inorganic Chemistry, 2005, 44: 3431 - 3440.
9Paradies J, Crudass J, Mackay F, et al. Photogeneration of tita- nium (Ⅲ) from titanium (Ⅳ) citrate in aqueous solution [ J ]. Journal of Inorganic Biochemistry, 2006, 1(30 : 1260 - 1264.
10Kuchmii S Ya, Korzhak A V, Kryukov A I. Photolysis of tita- nium (Ⅲ ) complexes in alcoholic matrices at 77 K [ J]. The- oretical and Experimental Chemistry, 1985, 21 : 458 -461.