Postmortem examination of an x-ray tube. Trappier AS. J Natl Med Assoc. 1978 Feb;70(2):97-9. PMID: 702556
A simple head-holder for radiography. Kirsh IE, Womack M. Radiology. 1966 Jun;86(6):1115. doi: 10.1148/86.6.1115. PMID: 5940020
Radiographic imaging using an effective rotationally symmetrical focal spot. Goodenough DJ, Weaver KE. Radiology. 1976 May;119(2):443-9. doi: 10.1148/119.2.443. PMID: 1265275
The "swinging" tube: a new concept. Amplatz K, Moore R, Korbuly D. Radiology. 1978 Sep;128(3):783-5. doi: 10.1148/128.3.783. PMID: 674654
Focal spot size variation with alteration in applied potential and tube current. EDMONDS EW. Radiography. 1955 Dec;21(252):247-8. PMID: 13280845