Jeon, Jeong-hwan; Kim, Sung-kyu; Koh, Jin-hwan (22 de dezembro de 2015). «Historical review on the patterns of open innovation at the national level: the case of the roman period». Journal of Open Innovation: Technology, Market, and Complexity. 1 (2). 20páginas. ISSN2199-8531. doi:10.1186/s40852-015-0026-4. hdl:10419/176513
Jeon, Jeong-hwan; Kim, Sung-kyu; Koh, Jin-hwan (22 de dezembro de 2015). «Historical review on the patterns of open innovation at the national level: the case of the roman period». Journal of Open Innovation: Technology, Market, and Complexity. 1 (2). 20páginas. ISSN2199-8531. doi:10.1186/s40852-015-0026-4. hdl:10419/176513
Jeon, Jeong-hwan; Kim, Sung-kyu; Koh, Jin-hwan (22 de dezembro de 2015). «Historical review on the patterns of open innovation at the national level: the case of the roman period». Journal of Open Innovation: Technology, Market, and Complexity. 1 (2). 20páginas. ISSN2199-8531. doi:10.1186/s40852-015-0026-4. hdl:10419/176513