1. Tim Ahrens and Shoko Mugikura, Size Specific Adjustments to Type Designs. Garching, Germany: Just Another Foundry, 2013.
2. Nicolas Barker, “The Aldine Roman in Paris, 1530–1534”. The Library, v.s5-XXIX, n.1, Mar. 1974, pp.5–20. https://doi.org/10.1093/library/s5-XXIX.1.5
3. Charles Bigelow, “On Type: Optical letter spacing for new printing systems”. Fine Print, vol.4, no.3, Oct. 1977. Reprinted in Visible Language, vol.11, no.3, 1977, pp.325–329, https://visiblelanguage.herokuapp.com/issue/43
4. Charles Bigelow and Donald Day, “Digital typography”. Scientific American, vol.249, no.2, Aug. 1983, pp.106–119.
5. Charles Bigelow, Kris Holmes, “The design of Lucida”, in Text Processing and Document Manipulation, J.C. van Vliet, ed. Cambridge: Cambridge University Press, 1986, pp.1–17.