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Fugmann, R.; Nickelsen, H.; Nickelsen, I.; Winter, J.H.: TOSAR: ein topologisches Verfahren zur Wiedergabe von synthetischen und analytischen Relationen von Begriffen (1970)
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Adamson, G.W.; Boreham, J.: ¬The use of an association measure based on character structure to identify semantically related pairs of words and document titles (1974)
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Bhattacharyya, K.: ¬The effectiveness of natural language in science indexing and retrieval (1974)
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