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Lee Duck Hee, 2017, Evaluation of the Precision of Color Coordinates using Average Color Distance, Proceedings of KIIEE Annual Conference, pp. 42

Lee Duck Hee, Nam Deukhyen, Seo Jung-Chul, 2014, Luminous Flux Stabilization of RGB LED Lamp, Proceedings of KIIEE Annual Conference, pp. 40

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Lee Duck Hee, Nam Deukhyen, Seo Jung-Chul, 2016, Stabilization of Optical Properties of White LED Lamp for lighting, Journal of Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 30, No. 6, pp. 11-15

Son Minwoo, Lee Duck Hee, Seo Jung-Chul, 2014, Aging-Time Dependence of Color Rendering Index of a LED Lamp for Lighting, Journal of Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 28, No. 3, pp. 1-6