Fine-Grained Processing Towards HL-LHC Computing in ATLAS. - Doug Benjamin; Paolo Calafiura; Taylor Childers; Kaushik De; Alessandro Di Girolamo; Esteban Fullana; Wen Guan; Tadashi Maeno; Nicolò Magini; Paul Nilsson; Danila Oleynik; Shaojun Sun; et al. (eScience, 2018)