Jäger R, Purpura M, Kingsley M (2007). "Phospholipids and sports performance". Journal of the International Society of Sports Nutrition4: 5. PMID17908342. doi:10.1186/1550-2783-4-5.
Starks MA, Starks SL, Kingsley M, Purpura M, Jäger R (2008). "The effects of phosphatidylserine on endocrine response to moderate intensity exercise". Journal of the International Society of Sports Nutrition5: 11. PMID18662395. doi:10.1186/1550-2783-5-11.
Jäger R, Purpura M, Geiss KR, Weiß M, Baumeister J, Amatulli F, Schröder L, Herwegen H. (2007). "The effect of phosphatidylserine on golf performance". Journal of the International Society of Sports Nutrition4: 23. PMID18053194. doi:10.1186/1550-2783-4-23.
Jäger R, Purpura M, Kingsley M (2007). "Phospholipids and sports performance". Journal of the International Society of Sports Nutrition4: 5. PMID17908342. doi:10.1186/1550-2783-4-5.
Starks MA, Starks SL, Kingsley M, Purpura M, Jäger R (2008). "The effects of phosphatidylserine on endocrine response to moderate intensity exercise". Journal of the International Society of Sports Nutrition5: 11. PMID18662395. doi:10.1186/1550-2783-5-11.
Jäger R, Purpura M, Geiss KR, Weiß M, Baumeister J, Amatulli F, Schröder L, Herwegen H. (2007). "The effect of phosphatidylserine on golf performance". Journal of the International Society of Sports Nutrition4: 23. PMID18053194. doi:10.1186/1550-2783-4-23.