Oldenburg, M.; Jensen, H.-J.; Wegner, R. (May 2013). "Burnout syndrome in seafarers in the merchant marine service". International Archives of Occupational and Environmental Health. 86 (4): 407–416. doi:10.1007/s00420-012-0771-7. ISSN0340-0131. PMID22526089.
Oldenburg, M.; Jensen, H.-J.; Wegner, R. (May 2013). "Burnout syndrome in seafarers in the merchant marine service". International Archives of Occupational and Environmental Health. 86 (4): 407–416. doi:10.1007/s00420-012-0771-7. ISSN0340-0131. PMID22526089.
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Oldenburg, M.; Jensen, H.-J.; Wegner, R. (May 2013). "Burnout syndrome in seafarers in the merchant marine service". International Archives of Occupational and Environmental Health. 86 (4): 407–416. doi:10.1007/s00420-012-0771-7. ISSN0340-0131. PMID22526089.