Reference Label	Details
Habenicht 1991	W. Habenicht, G. Reiser, and K. Müller-Dethlefs, J. Chem. Phys. 95, 4809-4820 (1991) High-Resolution Zero Kinetic Energy Electron Spectroscopy of Ammonia
Reiser 1993	G. Reiser, W. Habenicht, and K. Müller-Dethlefs, J. Chem. Phys. 98, 8462-8468 (1993) Zero Kinetic Energy (ZEKE) Photoelectron Spectroscopy of Ammonia by Nonresonant Two-Photon Ionization from the Neutral Ground State