Y.  Shao, Gan, Z., Epifanovsky, E., Gilbert, A. T. B., Wormit, M., Kussmann, J., Lange, A. W., Behn, A., Deng, J., Feng, X., and Ghosh, D., ?Advances in molecular quantum chemistry contained in the Q-Chem 4 program package?, Molecular Physics, vol. 113, no. 2, pp. 184-215, 2015.