TY - RPRT TI - Analytical approach to heterogeneity correction factor calculation for brachytherapy. AU - G M Daskalov AU - A S Kirov AU - J F Williamson PY - 1998 DO - 10.1118/1.598254 UR - https://pubmed.ncbi.nlm.nih.gov/9608484/ ID - 9608484 ER -