Hamar gömbölyű Pirospozsgás caffeine plant ennek eredményeként Elutasít Városnézés
Caffeine: Facts, Usage, and Side Effects
Caffeine: a well known but little mentioned compound in plant science - ScienceDirect
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Why Plants Make Caffeine | Science Features | Naked Scientists
Guarana: A caffeine-packed plant that can cause heart problems. - Mahtab Jafari, Pharm.D.
Will the World Run Out of Coffee by 2080? - Eater
Evolution of the Java Jive | A Moment of Science - Indiana Public Media