Orloff, John, ed. (24 October 2008). "Review of ZrO/W Schottky Cathode". Handbook of Charged Particle Optics (2nd ed.). CRC Press. ISBN 978-1420045543. LCCN 2008013026. OCLC 778264838. OL 11816479M. 978-1420045543
Orloff, John, ed. (24 October 2008). "Review of ZrO/W Schottky Cathode". Handbook of Charged Particle Optics (2nd ed.). CRC Press. ISBN 978-1420045543. LCCN 2008013026. OCLC 778264838. OL 11816479M. 978-1420045543
"Keywords | Glossary of TEM Terms | JEOL". www.jeol.co.jp. https://www.jeol.co.jp/en/words/emterms/search_result.html?keyword=Schottky-type+electron+gun