Ward CP, Redd K, Williams BM, Caler JR, Luo Y, McCoy JG.  
2002.  
Ginkgo biloba extract: cognitive enhancer or antistress buffer.. Pharmacol Biochem Behav. 72(4):913-22.
 Ward CP, Redd K, Williams BM, Caler JR, Luo Y, McCoy JG.  
2002.  
Ginkgo biloba extract: cognitive enhancer or antistress buffer.. Pharmacol Biochem Behav. 72(4):913-22.