Li, X., Volrath, S. L., Nicholl, D. B., Chilcott, C. E., Johnson, M. A., Ward, E. R., & Law, M. D. (2003). Development of Protoporphyrinogen Oxidase as an Efficient Selection Marker for Agrobacterium tumefaciens-Mediated Transformation of Maize. The American Society for Plant Biologists.

Li, Xianggan, Sandy L. Volrath, David B.G Nicholl, Charles E. Chilcott, Marie A. Johnson, Eric R. Ward, och Marcus D. Law. Development of Protoporphyrinogen Oxidase As an Efficient Selection Marker for Agrobacterium Tumefaciens-Mediated Transformation of Maize. The American Society for Plant Biologists, 2003.

Li, Xianggan, et al. Development of Protoporphyrinogen Oxidase As an Efficient Selection Marker for Agrobacterium Tumefaciens-Mediated Transformation of Maize. The American Society for Plant Biologists, 2003.