fix n/a withinb castle ref
}
@article{castle2022,
-author = {Castle, James R. and Duan, Jingwei and Feng, Xue and Chen, Quan},
+ author={Castle, James R and Duan, Jingwei and Feng, Xue and Chen, Quan},
title={Development of a virtual source model for Monte Carlo-based independent dose calculation for varian linac},
+ publisher={Wiley Online Library},
journal={Journal of Applied Clinical Medical Physics},
-volume = {n/a},
-number = {n/a},
pages={e13556},
year = {2022},
keywords={Monte Carlo independent dose calculation, virtual source model, Varian Linac},
