Analysis of information sources in references of the Wikipedia article "Number" in English language version.
{{cite book}}: CS1 maint: ignored ISBN errors (link)Indian mathematicians invented the concept of zero and developed the 'Arabic' numerals and system of place-value notation used in most parts of the world today
{{cite book}}: CS1 maint: ignored ISBN errors (link){{cite book}}: CS1 maint: location missing publisher (link){{cite journal}}: CS1 maint: DOI inactive as of October 2025 (link)Indian mathematicians invented the concept of zero and developed the 'Arabic' numerals and system of place-value notation used in most parts of the world today
{{cite book}}: CS1 maint: location missing publisher (link)