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Comment: Full text at: https://www.academia.edu/35536357.
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Comment: Full text at: dokumen pub.
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Comment: Full text at: https://www.persee.fr/doc/crai_0065-0536_1866_num_10_1_67233.
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Comment: Full text at: https://www.academia.edu/11722072.
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Comment: Full text at: https://www.jstor.org/stable/90019494.
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Comment: Full text at: https://www.jstor.org/stable/4426049.
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