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Issue Date	Title / Author(s) / Citation	File	Altmetrics
2012-02	Evaluation of new service concepts using rough set theory and group analytic hierarchy process Lee, Changyong; Lee, Hakyeon; Seol, Hyeonju; Park, Yongtae Expert Systems with Applications, Vol.39 No.3, pp.3404-3412	DOI
2012-10	Toward integration of products and services: Taxonomy and typology Park, Yongtae; Geum, Youngjung; Lee, Hakyeon Journal of Engineering and Technology Management - JET-M, Vol.29 No.4, pp.528-545	DOI