Não informado. (1999). SCI journal citation reports. Institute for Scientific Information.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. SCI Journal Citation Reports. Philadelphia, Pa: Institute for Scientific Information, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. SCI Journal Citation Reports. Institute for Scientific Information, 1999.
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