Yu-Jin Zhang, Yu-Zhi Song & Chuan-Kui Wang. (1970). Modulation on Optical Limiting and Two-Photon Absorption Behavior of a Molecular Medium by Two-Color Ultrashort Laser Pulses.
            <i>Journal of Atomic and Molecular Sciences</i>. <i>5</i> (2).
            163-170.
         doi:10.4208/jams.100313.010414a