Yamaguchi, Kazuho and Takao Itoh. "The Dam-Up Effect of Morphactin in Broad-LeavedTree Stems Evidence of the Downward Spread of Auxin" Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood, 45.4 (2009): 297-302. Retrieved 24 May. 2013, from doi:10.1515/hfsg.1991.45.4.297

Yamaguchi, K. & Itoh, T. (2009). The Dam-Up Effect of Morphactin in Broad-LeavedTree Stems Evidence of the Downward Spread of Auxin. Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood, 45(4), pp. 239-316. Retrieved 24 May. 2013, from doi:10.1515/hfsg.1991.45.4.297

Yamaguchi, Kazuho and Takao Itoh. 2009. The Dam-Up Effect of Morphactin in Broad-LeavedTree Stems Evidence of the Downward Spread of Auxin. Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood. 45(4): 239-316. Retrieved 24 May. 2013, from doi:10.1515/hfsg.1991.45.4.297