Ardran, G. M.; Crooks, H. E.; Ranby, P. W. (1 December 1963). "The Thorn Electroluminescent Image Retaining Panel: its X-ray Response with Particular Reference to Medical Radiology". British Journal of Radiology. 36 (432): 927–931. doi:10.1259/0007-1285-36-432-927. PMID14082842.
Ardran, G. M.; Crooks, H. E.; Ranby, P. W. (1 December 1963). "The Thorn Electroluminescent Image Retaining Panel: its X-ray Response with Particular Reference to Medical Radiology". British Journal of Radiology. 36 (432): 927–931. doi:10.1259/0007-1285-36-432-927. PMID14082842.