E. L. Simms and M. D. Rausher, “Cost and Benefits of Plant Resistance to Herbivory,” American Naturalist, Vol. 130, No. 4, 1987, pp. 570-581.
 S. Takatsuki, “Effects of Sika Deer on Vegetation in Japan: A Review,” Biological Conservation, Vol. 142, No. 9, 2009, pp. 1922-1929.
 R. M. A. Gill, “A Review of Damage by Mammals in North Temperate Forests: 3. Impact on Trees and Forests,” Forestry, Vol. 65, No. 4, 1992, pp. 363-388.
 K. Shimoda, K. Kimura, M. Kanzaki and K. Yoda, “The Regeneration of Pioneer Tree Species under Browsing Pressure of Sika Deer in an Evergreen Oak Forest,” Ecological Research, Vol. 9, No. 1, 1994, pp. 85-92.
 N. Akashi and T. Nakashizuka, “Effects of Bark Stripping by Sika Deer (Cervus nippon) on Population Dynamics of a Mixed Forest in Japan,” Forest Ecology and Managemen, Vol. 113, No. 1, 1999, pp. 75-82.
 S. Takatsuki, “Food Habits of Ungulates and Anti-Grazing Adaptation of Plants,” In: I. Washitani and T. Ogushi, Eds., Interrelations between Plants and Animals, Heibonsha, Tokyo, 1993, pp. 104-128.
 A. Yamashiro and T. Yamashiro, “Seed Dispersal by Kerama Deer (Cervus nippon keramae) on Aka Island, the Ryukyu Archipelago, Japan,” Biotropica, Vol. 38, No. 3, 2006, pp. 405-413.
 S. M. Cooper and N. Owen-Smith, “Effects of Plant Spinescence on Large Mammalian Herbivores,” Oecologia, Vol. 68, No. 3, 1986, pp. 446-455.
 G. E. Belovsky, O. J. Schmitz, J. B. Slade and T. J. Dawson, “Effects of Spines and Thorns on Australian Arid Zone Herbivores of Different Body Masses,” Oecologia, Vol. 88, No. 4, 1991, pp. 521-528.
 G. E. Belovsky and O. J. Schmitz, “Plant Defenses and Optimal Foraging by Mammalian Herbivores,” Journal of Mammalogy, Vol. 75, No. 4, 1994, pp. 816-832.
 J. H. Gowda, “Spines of Acacia tortilis: What Do They Defend and How?” Oikos, Vol. 77, No. 2, 1996, pp. 279-284. http://dx.doi.org/10.2307/1382464
 S. Takatsuki, “Ecological Studies on Effect of Sika Deer (Cervus nippon) on Vegetation III: The Vegetation of Iyo-Kashima Island, Southwestern Shikoku, with Reference to Grazing Effect of Sika Deer,” Ecological Review, Vol. 20, No. 1, 1982, pp. 15-29.
 S. Takei, K. Ohga, H. Hayakawa, J. Yokoyama, K. Ito, S. Tebayashi, R. Arakawa and T. Fukuda, “Comparative Analysis of the Prickles on Rubus sieboldii (Rosaceae) between Grazed and Ungrazed Areas in South-Western Shikoku, Japan,” Journal of Plant Studies, Vol. 2, No. 1, 2013, pp. 152-157.
 J. J. Chen, C. Y. Chung, T. L. Hwang, J. F. Chen, W. H. Chang, Y. H. Ho and C. W. Lin, “New Alkaloid, Benzenoid, and Anti-Inflammatory Constituents from Zanthoxylum ailanthoides,” Planta Medica, Vol. 74, No. 9, 2008, p. 51. http://dx.doi.org/10.1055/s-0028-1084396
 T. Kamijo, K. Shimada, Y. Hoshino and T. Endo, “Comparative Study of Seedling Morphology of Zanthoxylum ailanthoides Sieb. Et Zucc. between Izu Islands and Izu Peninsula,” Bulletin of Tsukuba University Forest, Vol. 17, 2001, pp. 77-83.
 S. Takatsuki, “Ecological Studies on Effect of Sika Deer (Cervus nippon) on Vegetation III: The Vegetation of Akune Island, Kagoshima Prefecture, with Reference to Browsing and Grazing Effect of Sika Deer,” Ecological Review, Vol. 19, No. 3, 1980, pp. 123-144.
 K. Ikeda and T. Iwamoto, “An Experiment in Estimating Sika Deer Density by the Pellet Count Method,” Mammalian Science, Vol. 44, No. 2, 2004, pp. 81-86.
 S. Kiyohisa, K. Sone, K. Hata and T. Koizumi, “Group Composition and Distribution of Japanese Sika Deer (Cervus nippon mageshimae) on Akune Island, Southern Japan,” Kyushu Journal of Forest Research, Vol. 58, 2005, pp. 188-190.
 N. Kido, “Botanical Research of the Island of Akuneohshima and the Area around Kuratsu Shrine on the Mainland,” Bulletin of the International University of Kagoshima, Social Welfare, Vol. 28, No. 3, 2010, pp. 17-24.
 S. Takatsuki and T. Y. Ito, “Plants and Plant Communities on Kinkazan Island, Northern Japan, in Relation to Sika Deer Herbivory,” In: D. R. McCullough, S. Takatsuki and K. Kaji, Eds., Sika Deer: Biology and Management of Native and Introduced Populations, Springer, Tokyo, 2009, pp. 125-143.