http://www.whfoods.com/genpage.php?tname=foodspice&dbid=35

https://www.organicfacts.net/health-benefits/fruit/health-benefits-of-plums.html

http://www.nutrition-and-you.com/plums.html

http://www.healthbenefitstimes.com/health-benefits-of-plums/

http://healthyeating.sfgate.com/benefits-eating-prunes-4421.html

http://www.healthline.com/health/food-nutrition/top-benefits-of-prunes-prune-juice#3