Shifting constellations of actors and their influence on policy diffusion : a study of the diffusion of drug courtsDouglas, James W.; Raudla, Ringa; Hartley, Roger E.The policy studies journal2015 / p. 484-511 : ill https://doi.org/10.1111/psj.12113 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS