Gleditsch, Kristian Skrede & Mauricio Rivera Celestino (2016) Non-Violence and Democratization, PRIO Policy Brief, 16. Oslo: PRIO.
Celestino, Mauricio Rivera; & Kristian Skrede Gleditsch (2013) Fresh carnations or all thorn, no rose? Nonviolent campaigns and transitions in autocracies, Journal of Peace Research 50(3): 385–400.
The Peace Research Institute Oslo (PRIO) conducts research on the conditions for peaceful relations between states, groups and people.