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Vakkari, P.; Järvelin, K.: Explanation in information seeking and retrieval (2005)
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Vakkari, P.; Chang, Y.-W.; Järvelin, K.: Disciplinary contributions to research topics and methodology in Library and Information Science : leading to fragmentation? (2022)
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Haiqi, Z.: ¬The literature of Qigong : publication patterns and subject headings (1997)
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