Castro, A., Marques, M., Varsano, D., Sottile, F., & Rubio, A. (2009). The challenge of predicting optical properties of biomolecules: what can we learn from time-dependent density-functional theory? Comptes Rendus de Physique, 10, 469-490. https://doi.org/10.1016/j.crhy.2008.09.001