Yurchenko, S. N., Carvajal, M., Lin, H., Zheng, J., Thiel, W., & Jensen, P. (2005). Dipole moment and rovibrational intensities in the electronic ground state of NH₃: Bridging the gap between ab initio theory and spectroscopic experiment. Journal of Chemical Physics, 122(10): 104317. doi:10.1063/1.1862620.