Kun Fang, Jinfeng Zhao, Yongqing Li & Fengcai Ma. (1970). The Velocity Gauge KFR Ionization Rates of H(2px), H(2py) and H(2pz) Atom in the Linear Polarized Laser Field. Communications in Computational Chemistry. 2 (1). 9-21. doi:10.4208/cicc.2014.v2.n1.2