"Japan Advertising Council". Archived from the original on 2007-03-01. Retrieved 2007-03-14. For details on the campaign featuring SOHLA, navigate through the Japanese page to the 2003 campaign listing, at entry "東大阪の人工衛星" (Higashiosaka's Satellite) [1]Archived 2007-03-12 at the Wayback Machine
Nussbaum, "Provinces and prefectures" in p. 780, p. 780, at Google Books
Aoki, Eriko. "Korean children, textbooks, and educational practices in Japanese primary schools" (Chapter 8). In: Ryang, Sonia. Koreans in Japan: Critical Voices from the Margin (Routledge Studies in Asia's Transformations). Routledge, October 8, 2013. ISBN1136353054, 9781136353055. Start: p. 157. CITED: p. 166.
"Japan Advertising Council". Archived from the original on 2007-03-01. Retrieved 2007-03-14. For details on the campaign featuring SOHLA, navigate through the Japanese page to the 2003 campaign listing, at entry "東大阪の人工衛星" (Higashiosaka's Satellite) [1]Archived 2007-03-12 at the Wayback Machine