עיצוב מעלה-מטה ומטה-מעלה – הבדלי גרסאות

* [https://web.archive.org/web/20070717153035/http://www.acm.org/classics/dec95/ Program Development by Stepwise Refinement]

* [https://web.archive.org/web/20060304154216/http://search.bwh.harvard.edu/pdf/ChangingYourMind.pdf PDF about visual attention]

* מידע מהספר האינטרנטי [httphttps://wwwweb.archive.org/web/20080609024324/http://perldesignpatterns.com/?PerlDesignPatterns Perl Design Patterns]