The dose distribution surrounding 192Ir and 137Cs seed sources Thomason, C. ; Mackie, T. R. ; Lindstrom, M. J. ; Higgins, P. D. Abstract Publication: Physics in Medicine and Biology Pub Date: April 1991 DOI: 10.1088/0031-9155/36/4/006 Bibcode: 1991PMB....36..475T