Reference Label	Details
Niu 1993	B. Niu, D. A. Shirley, and Y. Bai, J. Chem. Phys. 98, 4377-4390 (1993) High Resolution Photoelectron Spectroscopy and Femtosecond Intramolecular Dynamics of H2CO+ and D2CO+
Niu 1993c	B. Niu, D. A. Shirley, Y. Bai, and E. Daymo, Chem. Phys. Lett. 201, 212-216 (1993) High-Resolution He Ialpha Photoelectron Spectroscopy of H2CO and D2CO using Supersonic Molecular Beams