Institution: | 1. Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia;2. LERMA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, 5 Place Jules Janssen, 92190 Meudon, France;3. Department of Applied Physics, Technical University-Sofia, 1000 Sofia, Bulgaria;4. Grupo de Fsica de Plasmas: Diagnosis, Modelos y Aplicaciones (FQM-136), Edificio A. Einstein (C-2), Campus de Rabanales, Universidad de Crdoba, 14071 Crdoba, Spain |