Martin Wolkewitz, Arthur Allignol, Nicholas Graves, Adrian G. Barnett (2011. november 11.). „Christmas 2011: Death’s Dominion – Is 27 really a dangerous age for famous musicians? (Retrospective cohort study)”. British Medical Journal (The BMJ)343, d7799. o. DOI:10.1136/bmj.d7799. PMID22187325. PMC3243755.
Martin Wolkewitz, Arthur Allignol, Nicholas Graves, Adrian G. Barnett (2011. november 11.). „Christmas 2011: Death’s Dominion – Is 27 really a dangerous age for famous musicians? (Retrospective cohort study)”. British Medical Journal (The BMJ)343, d7799. o. DOI:10.1136/bmj.d7799. PMID22187325. PMC3243755.
ncbi.nlm.nih.gov
Martin Wolkewitz, Arthur Allignol, Nicholas Graves, Adrian G. Barnett (2011. november 11.). „Christmas 2011: Death’s Dominion – Is 27 really a dangerous age for famous musicians? (Retrospective cohort study)”. British Medical Journal (The BMJ)343, d7799. o. DOI:10.1136/bmj.d7799. PMID22187325. PMC3243755.