4. IMANISHI, H. 1983. Effects of exposure of bulbs to smoke and ethylene on flowering of Narcissus tazetta cultivar ‘Grand Solcil d′Or’. Scientia Hort. 21: 173-180.
5. IMANISHI, H. and D. YUE. 1986. Effects of duration of exposure to ethylene on flowering of Dutch iris. Acta Hort. 177: 141-145.