Cell. 2017 Aug 10;170(4):774-786.e19. doi: 10.1016/j.cell.2017.07.043. PMID: 28802045

Transcription-Replication Conflict Orientation Modulates R-Loop Levels and Activates Distinct DNA Damage Responses
http://www.cell.com/cell/fulltext/S0092-8674(17)30879-6