Leonard Gillman, Writing mathematics well : a manual for authors, Mathematical Association of America, 1987.
Nicholas J. Higham, Handbook of writing for the mathematical sciences, Society for Industrial and Applied Mathematics, 1993.
Donald E. Knuth, Tracy Larrabee, and Paul M. Roberts, Mathematical writing, Mathematical Association of America, 1989.
Steven G. Krantz, A primer of mathematical writing: being a disquistion on having your ideas recorded, typeset, published, read and appreciated, American Mathematical Society, 1997.
John Meier and Thomas Rishel, Writing in the Teaching and Learning of Mathematics, Mathematical Association of America, 1998.
Candia Morgan, Writing Mathematically : The Discourse of 'Investigation' (Studies in Mathematics Education), Falmer Press, 1998.
Norman E. Steenrod, Paul R. Halmos, Menahem M. Chiffer, and Jean A. Dieudonne, How to Write Mathematics, American Mathematical Society, 1973.
Andrew Sterrett (ed.), Using Writing to Teach Mathematics, Mathematical Association of America, 1992.
Bernadette Russek, Writing to Learn Mathematics, WAC Journal, Vol. 9, pp. 36-45. (PDF file)
David K Pugalee, Writing, mathematics, and metacognition: Looking for connections through students' work in mathematical problem solving, School Science and Mathematics, May 2001.
Using Writing in Mathematics (University of Puget Sound)
Writing in Mathematics by Annalisa Crannel, Franklin & Marshall College
Hints, tips, and help for writing mathematics well by Kevin Lee, Purdue University
Writing for Mathematics, Georgetown University
Writing for a Math Class, Math Academy Online
Writing Tips, Harold Boas, Texas A & M University
Articles on Writing Across the Curriculum - Math, a list of published articles on using writing in the teaching of mathematics, Indiana University
Using Writing to Learn Mathematics by Anthony Edgington and Rodney F. Dick, University of Louisville
Writing Skills Bibliography: Mathematics, a list of published articles on using writing in the teaching of mathematics, University of South Florida
Writing in Mathematics, about journal writing in mathematics classes (oriented more toward K-12)
How to Write Mathematics by Paul Halmos (RTF file), from Steenrod et al book
Writing in Mathematics, Statistics and Computer Science Courses, Marquette University
Teaching with Writing - Mathematics, University of Minnesota
Resources for Writing in Mathematics Courses, Project NExT
Writing in the Mathematics Classroom by Maureen Schick, Michigan Tech University
Writing Assignments in Calculus by Tommy Ratliff, Wheaton College
Writing a Research Paper in Mathematics by Ashley Reiter, MIT
How to Write Mathematics, University of Alberta (PDF file)
Remarks on Expository Writing in Mathematics by Robert B. Ash, University of Illinois at Urbana-Champaign (PDF file)
Tips on Writing in Mathematics by Paul Zorn, St. Olaf's College (PDF file)
Writing Expository Mathematics by Richard Delaware, University of Missouri - Kansas City
Mathematics Writing Resources, a list of published articles on using writing in the teaching of mathematics, SUNY Cortland
Writing Across the Curriculum Mathematics Bibliography, a list of published articles on using writing in the teaching of mathematics (primarily K-12), University of Wisconsin Milwaukee
St. Mary's College Mathematical Writing Pages
Emphasis on Writing in Mathematics, excerpt from a textbook entitled Mathematical Reasoning: Writing and Proof by Ted Sundstrom, Grand Valley State University (PDF file)
Advice for Undergraduates on Special Aspects of Writing Mathematics, Swarthmore College (PDF file)
Writing Mathematics, London Mathematical Society (PDF file)
Writing Mathematics by Eric Behr, Northern Illinois University