M. A. Hines, H. A. Michelsen, and R. N. Zare, “2+1 Resonantly Enhanced Multiphoton Ionization of CO via the E 1Π – X1Σ+Transition: From Measured Ion Signals to Quantitative Population Distributions,”J. Chem. Phys. 93, 8557-8564 (1990).
