"Caffeine and related purine alkaloids: biosynthesis, catabolism, function and genetic engineering". Phytochemistry69 (4): 841–56. February 2008. doi:10.1016/j.phytochem.2007.10.029. PMID18068204.
"Caffeine and related purine alkaloids: biosynthesis, catabolism, function and genetic engineering". Phytochemistry69 (4): 841–56. February 2008. doi:10.1016/j.phytochem.2007.10.029. PMID18068204.
"Liquid chromatographic determination of methylxanthines and catechins in herbal preparations containing guaraná". Journal of AOAC International81 (4): 691–701. July–August 1998. doi:10.1093/jaoac/81.4.691. PMID9680692.
„Caffeine“. Biological Magnetic Resonance Data Bank, University of Wisconsin-Madison. 2007-yil 24-noyabrda asl nusxadan arxivlangan. Qaraldi: 2007-yil 19-sentyabr.
Duke JA. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton: CRC Press, 1992. ISBN 978-0-8493-3672-0. OCLC25874249.
Duke JA. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton: CRC Press, 1992. ISBN 978-0-8493-3672-0. OCLC25874249.
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„Caffeine“. Biological Magnetic Resonance Data Bank, University of Wisconsin-Madison. 2007-yil 24-noyabrda asl nusxadan arxivlangan. Qaraldi: 2007-yil 19-sentyabr.
Duke JA. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton: CRC Press, 1992. ISBN 978-0-8493-3672-0. OCLC25874249.
Duke JA. Handbook of phytochemical constituents of GRAS herbs and other economic plants. Boca Raton: CRC Press, 1992. ISBN 978-0-8493-3672-0. OCLC25874249.