Shabana Saeed, and Samina Bano. “Improved Serotonergic Tone Contributes to the Mechanism of Action of St John’s Wort in Nicotine Withdrawn Mice”. Journal of Pharmacy and Nutrition Sciences, vol. 4, no. 4, Aug. 2014, pp. 255-62, doi:10.6000/1927-5951.2014.04.04.4.