Check out the special supplement in Acta Paediatrica that includes a series of systematic reviews on the impact of breastfeeding on maternal and child health and interventions to improve breastfeeding practices. It is a free access publication and would be most useful to those protecting, promoting and supporting breastfeeding.
This free publication can be found at http://onlinelibrary.wiley.com/doi/10.1111/apa.2015.104.issue-S467/issuetoc