7Mertens M. Growth requlation of large flowered Rhododendrons (Rhododendron catawbiense Michx) [J].Acta Horticulturae, 1994, (364): 127-130.
8Baerdemaeker C I De. Influencce of paclobutranol and photoperiod on growth and flowering of Gardenia jasminoides Ellis cultivar 'Veitchii'[ J ].Scientia Horticulturae, 1994,58 (4): 315-324.
9Wilfrest G J. Comparative effect of growth requlators on poinsettias[J].Proceeding of the Florida State Horticultural Society, 1993, 106: 294-297.