@article{Toffoli2013, author = "Daniele Toffoli and Piero Decleva", title = "{Two-photon cross section of the N 1s orbitals of nitrogen for both parallel and perpendicular orientations of the molecular axis with respect to the laser polarization vector}", year = "2013", month = "6", url = "https://iop.figshare.com/articles/figure/_Two_photon_cross_section_of_the_N_1s_orbitals_of_nitrogen_for_both_parallel_and_perpendicular_orien/1012118", doi = "10.6084/m9.figshare.1012118.v1" }