Nagy, F., Fluhr, R., Kuhlemeier, C., Kay, S., Boutry, M., Green, P., Poulsen, C., & Chua, NH. (1986). Cis-acting Elements for Selective Expression of 2 Photosynthetic Genes in Transgenic Plants. Royal Society of London. Philosophical Transactions. Biological Sciences, 314(1166), 493-500. https://doi.org/10.1098/rstb.1986.0068 (Original work published 1986)