Jinli Ding Lanzhou Wang Zhonglin Chai A Novel Hypothesis of the Opposite Phyllotaxis Modeling of Plants. 197-201 2009 ICNC (6) http://doi.ieeecomputersociety.org/10.1109/ICNC.2009.92 conf/icnc/2009 db/conf/icnc/icnc2009-6.html#DingWC09