scientific article published in 1993

scientific article published in 1964

scientific article published in 1960

scientific article published in 1962

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scientific article published in 1958

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scientific article published in 1961

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scientific article published in 1962

scientific article published in 1962

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scientific article published in 1964

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scientific article published in 1960

scientific article published in 1960

scientific article published in 1962

scientific article published in 1962

scientific article published in 1964

scientific article published in 1964