AAPM TG 158: Measurement and calculation of doses outside the treated volume from external-beam radiation therapy. - Kry, Stephen F.; Bednarz, Bryan; Howell, Rebecca M.; Dauer, Larry; Followill, David; Klein, Eric; Paganetti, Harald; Wang, Brian; Wuu, Cheng ‐ Shie; George Xu, X. (Medical Physics, 2017)