1. Carvalho, I. S., Cavaco, T., Carvalho, L. M., Duque, P. 2010. Effect of photoperiod on flavonoid pathway activity in sweet potato (Ipomoea batatas (L.) Lam.) leaves. Food Chem. 118: 384–390.
2. Hata, N., Masuda, M., Kobayashi, A., Muranaka, T., Okazawa, A., Murakami, K. 2011. Application of continuous light in a plant factory system 3. Moderation of injuries induced by continuous light and relative tolerance to continuous light. (in Japanese) J. Sci. High Technol. Agric. 23: 137–143.
3. Hata, N., Masuda, M., Murakami, K., Kobayashi, A. 2012. Application of continuous light in a plant factory system 4. Physiological change and concept of injury induction in plant leaves under continuous light (in Japanese). Sci. Rep. Faculty Agric., Okayama Univ. 101: 49–64.
4. Higashiuchi, K., Hisano, M., Nakano, Y., Uno, Y., Kuroki, S., Ishiguro, K., Oku, H., Itoh, H. 2014. Development of environmental control method for production of high quality Hedyotis diffusa. The International Conference on Plant Factory 2014. November. Kyoto. Proc. of International Conference on Plant Factory 2014 (USB).
5. Hisano, M., Uno, Y., Ogino, N., Kitaaki, H., Ishigro, K., Oku, H., Itoh, H. 2013. Development of environmental control method for rapid production of high quality Hedyotis diffusa. 2013 IFAC Bio-Robotics Conference, March, Osaka, Proc. 2013 IFAC Bio-Robotics Conference, (http://www.ifac-papersonline.net).