Zameer , H. et al. 2013. Comparative effects of caffeine & L-Theanine consumption on subjective cardiovascular signs and Neurophysiological responses. International Journal of Endorsing Health Science Research. 1, 1 (Jul. 2013), 38–42. DOI:https://doi.org/10.29052/IJEHSR.v1.i1.2013.38-42.