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Schifano, Fabrizio; Leoni, Mauro; Martinotti, Giovanni; Rawaf, Salman; Rovetto, Francesco (August 2003). "Importance of Cyberspace for the Assessment of the Drug Abuse Market: Preliminary Results from the Psychonaut 2002 Project". CyberPsychology & Behavior. 6 (4): 405–410. doi:10.1089/109493103322278790. PMID14511453.
Schifano, Fabrizio; Leoni, Mauro; Martinotti, Giovanni; Rawaf, Salman; Rovetto, Francesco (August 2003). "Importance of Cyberspace for the Assessment of the Drug Abuse Market: Preliminary Results from the Psychonaut 2002 Project". CyberPsychology & Behavior. 6 (4): 405–410. doi:10.1089/109493103322278790. PMID14511453.
Newcombe, Russell (2008). "Ketamine Case Study: The Phenomenology of a Ketamine Experience". Addiction Research & Theory. 16 (3): 209–215. doi:10.1080/16066350801983707. S2CID143462683.