Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Blake David and Robson Robert E.,"Negative Differential Conductivity in Gases: The ""True Origin"".",Journal of the Physical Society of Japan,00319015,THE PHYSICAL SOCIETY OF JAPAN,2001,70,12,3556-3559,https://cir.nii.ac.jp/crid/1390282679159625344,https://doi.org/10.1143/jpsj.70.3556