^Shuowen Jiezi: “丶,有所絶止,丶而識之也。” "Where there is an end, 丶 is used to mark it." This refers to the practice of using 丶 as a judou punctuation mark.
Literature
Fazzioli, Edoardo (1987). Chinese calligraphy : from pictograph to ideogram : the history of 214 essential Chinese/Japanese characters. calligraphy by Rebecca Hon Ko. New York: Abbeville Press. ISBN0-89659-774-1.
Leyi, Li (1993). Tracing the Roots of Chinese Characters: 500 Cases. Beijing. ISBN978-7-5619-0204-2.{{cite book}}: CS1 maint: location missing publisher (link)
External links
Wikimedia Commons has media related to Radical 003.
GF 0011-2009 Table of Indexing Chinese Character Components prescribes 201 principle indexing components and 100 associated indexing components (in brackets) used in Simplified Chinese. Not all associated indexing components are listed above.