The 5ESS switching system: Hardware design. - John C. Borum; John Janik; Robert F. Metz; Jesse Russell; D. Paul Smith; Eugene J. Theriot (AT&T Tech. J., 1985)

A Recommended Practice for Describing Software Designs: IEEE Standards Project 1016. - H. Jack Barnard; Robert F. Metz; Arthur L. Price (IEEE Trans. Software Eng., 1986)