Não informado. (1991). The European Journal of Surgery. Scandinavian University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The European Journal of Surgery. Stockholm: Scandinavian University Press, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The European Journal of Surgery. Scandinavian University Press, 1991.
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