Schwartzman, Steven (1996), The Words of Mathematics: An Etymological Dictionary of Mathematical Terms Used in English, Mathematical Association of America, pp. 100–101, ISBN 9780883855119. 9780883855119
Darling, David (2004), The Universal Book of Mathematics: From Abracadabra to Zeno's Paradoxes, John Wiley & Sons, p. 140, ISBN 9780471270478. 9780471270478
Schwartzman, Steven (1996), The Words of Mathematics: An Etymological Dictionary of Mathematical Terms Used in English, Mathematical Association of America, pp. 100–101, ISBN 9780883855119. 9780883855119
Darling, David (2004), The Universal Book of Mathematics: From Abracadabra to Zeno's Paradoxes, John Wiley & Sons, p. 140, ISBN 9780471270478. 9780471270478
Wright, Carroll Davidson (1910), The New Century Book of Facts: A Handbook of Ready Reference, King-Richardson Company, p. 462. https://books.google.com/books?id=JnBMAAAAMAAJ&pg=PA462
Wells, David (1997), The Penguin Dictionary of Curious and Interesting Numbers (3rd ed.), Penguin, p. 66, ISBN 9780140261493. 9780140261493
Gross | Origin and meaning of gross by Online Etymology Dictionary https://www.etymonline.com/word/gross
Gullberg, Jan (1997), Mathematics: From the Birth of Numbers, W. W. Norton & Company, ISBN 9780393040029. 9780393040029
Dudley, Underwood (1996), Mathematical Cranks, Cambridge University Press, p. 22, ISBN 9780883855072. 9780883855072
Bellos, Alex (2012-12-12), "Dozenalists of the world unite! Rise up against the tyranny of ten!", The Guardian. https://www.theguardian.com/science/alexs-adventures-in-numberland/2012/dec/12/dozenalists-world-unite-tyranny-ten