== References ==* Christopher Kelty, "EMACS, grep, and UNIX: authorship, invention and translation in software", http://www.burlingtontelecom.net/~ashawley/gnu/emacs/ConText-Kelty.pdf
* Christopher Kelty, «EMACS, grep, and UNIX: authorship, invention and translation in software», http://www.burlingtontelecom.net/~ashawley/gnu/emacs/ConText-Kelty.pdf