[1]
B.-G. Lee, M.-B. Yeom, and E.-H. Sung, “Characteristics of Innovation System 4.0 in the Edge of the Fourth Industrial Revolution Four Relevant Cases in Germany”, IJET, vol. 8, no. 1.4, pp. 573–578, Jan. 2019, doi: 10.14419/ijet.v8i1.4.26312.