Trickl, T.T.TricklProch, D.D.ProchKompa, K.L.K.L.Kompa2022-03-032022-03-031993https://publica.fraunhofer.de/handle/publica/18350810.1006/jmsp.1993.1279en535Resonance enhanced 2 + 2 photon ionization of nitrogen. The Lyman-Birge-Hopfield band systemjournal article