Smith, D., Batsanov, A., Fox, M., Beeby, A., Apperley, D., Howard, J., & Dyer, P. (2009). From Cyclic Iminophosphoranes to -Conjugated Materials. Angewandte Chemie International Edition, 48(48), 9109-9113. https://doi.org/10.1002/anie.200904219