MODULATIONAL INSTABILITY OF LANGMUIR OSCILLATIONS IN THE FIELD OF AN ELECTROMAGNETIC WAVE I. A. Kol'chugina, A. G. Litvak, T. N. Fedoseeva et G.M. FraimanJ. Phys. Colloques, 40 C7 (1979) C7-629-C7-630DOI: https://doi.org/10.1051/jphyscol:19797305