Gurley B, Wang P, Gardner S (1998). «Ephedrine-type alkaloid content of nutritional supplements containing Ephedra sinica (Ma-huang) as determined by high performance liquid chromatography». J Pharm Sci. 87 (12): 1547–53. PMID10189265. doi:10.1021/js9801844
Abourashed E, El-Alfy A, Khan I, Walker L (2003). «Ephedra in perspective--a current review». Phytother Res. 17 (7): 703–12. PMID12916063. doi:10.1002/ptr.1337
Haller C, Benowitz N (2000). «Adverse cardiovascular and central nervous system events associated with dietary supplements containing ephedra alkaloids». N Engl J Med. 343 (25): 1833–38. PMID11117974. doi:10.1056/NEJM200012213432502
Gurley B, Wang P, Gardner S (1998). «Ephedrine-type alkaloid content of nutritional supplements containing Ephedra sinica (Ma-huang) as determined by high performance liquid chromatography». J Pharm Sci. 87 (12): 1547–53. PMID10189265. doi:10.1021/js9801844
Abourashed E, El-Alfy A, Khan I, Walker L (2003). «Ephedra in perspective--a current review». Phytother Res. 17 (7): 703–12. PMID12916063. doi:10.1002/ptr.1337
Haller C, Benowitz N (2000). «Adverse cardiovascular and central nervous system events associated with dietary supplements containing ephedra alkaloids». N Engl J Med. 343 (25): 1833–38. PMID11117974. doi:10.1056/NEJM200012213432502