Original reference:
Shu, Y.; Parker, K.; Truhlar, D. G. “Dual-Functional Tamm-Dancoff Approximation: A Simple Linear Response Theory to Correctly Describe the Potential Energy Surfaces In the Vicinity of S1/S0 Conical Intersection” J. Phys. Chem. Lett. 2017, to be published.
Related references:
Configuration Interaction-Corrected Tamm-Dancoff Approximation: A Time-Dependent Density Functional Method with the Correct Dimensionality of Conical Intersections. S. L. Li, A. V. Marenich, X. Xu, and D. G. Truhlar, Journal of Physical Chemistry Letters 5, 322-328 (2014). [link]
Shu, Y.; Parker, K.; Truhlar, D. G. “Dual-Functional Tamm-Dancoff Approximation: A Simple Linear Response Theory to Correctly Describe the Potential Energy Surfaces In the Vicinity of S1/S0 Conical Intersection” J. Phys. Chem. Lett. 2017, to be published.
Related references:
Configuration Interaction-Corrected Tamm-Dancoff Approximation: A Time-Dependent Density Functional Method with the Correct Dimensionality of Conical Intersections. S. L. Li, A. V. Marenich, X. Xu, and D. G. Truhlar, Journal of Physical Chemistry Letters 5, 322-328 (2014). [link]