Philosophistry Wiki
Behavioral Activation Treatment

Results when Googling "behavioral activation meta-analysis" (as of Nov 2018):

David Ekers (Jun 2014) Behavioural Activation for Depression; An Update of Meta-Analysis of Effectiveness and Sub Group Analysis

Anna Huguet (Aug 2018) A systematic review and meta-analysis on the efficacy of Internet-delivered behavioral activation.

Pim Cuijpers (Apr 2007) Behavioral activation treatments of depression: A meta-analysis