Cooper, L., Walls, R., Elser, J., Gandolfo, M., Stevenson, D., Smith, B., Preece, J., Athreya, B., Mungall, C., Rensing, S., Hiss, M., Lang, D., Reski, R., Berardini, T., Li, D., Huala, E., Schaeffer, M., Menda, N., Arnaud, E., Shrestha, R., Yamazaki, Y., & Jaiswal, P. (2013). The Plant Ontology as a Tool for Comparative Plant Anatomy and Genomic Analyses. : Oxford University Press on behalf of Japanese Society of Plant Physiologists.