[1]    Donald Arseneau, division, TUGboat 18(2), June 1997, p. 75–76, http://users.comlab.ox.ac.uk/jeremy.gibbons/hiw/hey-18n2.ps.

[2]    Nandan Bagchee and Eitan M. Gurari, SwiExr, http://www.cse.ohio-state.edu/~gurari/mathexr/.

[3]    Computers To Help People, Inc. (CHPI), Sponsoring Technical Reference Books and Manuals, http://www.chpi.org/refspons.htm.

[4]    R. Craig. Learning the Nemeth Braille Code: A Manual for Teachers and Students, American Printing House for the Blind, 1987.

[5]    A. Nemeth. The Nemeth Code of Braille Mathematics and science Notation. The Braille Authority of North America (BANA), American Printing house for the Blind, 1972 revision. (French version: http://www.meq.gouv.qc.ca/ens-sup/ens-coll/braille/Code_braille_mathematique.pdf)

[6]    Texas Partnership for Increasing Braille Production, Report of Braille Production Specialist Focus Group Meeting, January 2000, http://www.tsbvi.edu/textbooks/afb/texas-transcriber.htm.

[7]    Wolf Paulus, SwiXml, http://www.swixml.org/.