Agvaantseren, Uranchimeg Julia, and Park Sae Hoon. “An Analysis of Educational Patents of Innovation For Formal Education”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 10, no. 1 (October 25, 2013): 52–62. Accessed July 3, 2024. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/1143.