1. This Matter of Contact Potential;Bowie,1936
2. The Effect of Contact Potentials on Vacuum Tube Characteristics;O'Neill,1941
3. The Effects of Grid Contact Potential on Electron Tube Characteristics;O'Neill,1948
4. The Effects of Grid Contact Potential and Initial Electron Velocity on Electron Tube Characteristics;O'Neill;The Sylvania Technologist,1948
5. La Mesure des Differences de Potentiel Contact et du Courant de Saturation dans les Tubes a Vide utilisant des Cathodes a Oxydes;Champeix;Annales de Radioelectricite,1946