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^Niwa, Motoji. Zusetsu sekai no bussokuseki: bussokuseki kara mita Bukkyō 図説世界の仏足石: 仏足石から見た仏教 [Buddha's footprints, pictures and explanations: Buddhism as seen through the footprints of Buddha]. Meicho Shuppan. 1992: 5. ISBN 4-626-01432-1(日语及英语).
^Prasopchingchana, Sarunya. History and Cultural Heritage: Past and Future. International Journal on Humanistic Ideology. 2013.