Structured

Felgall Software - Structured Programming - Overview, diagrams, examples.
http://www.felgall.com/struc.htm

Jackson Structured Programming Editor - A program to create JSP diagrams and generate a C or Pascal code skeleton.
http://www.his.se/templates/vanligwebbsida1.aspx?id=15391

Jackson System Development (JSD) - Overview, stage descriptions.
http://www.dsisoft.com/jackson_system_development.html

Definition: Structured Programming - From General Services Administration, Federal Standard 1037C (Telecom Glossary 2000): 'Telecommunications: Glossary of Telecommunication Terms'. Long title, short but very clear definition.
http://www.its.bldrdoc.gov/fs-1037/dir-035/_5154.htm

Structured Programming - Article at Cunningham and Cunningham Wiki site.
http://c2.com/cgi/wiki?StructuredProgramming

How to Draw Jackson System Development (JSD) Diagrams - Learn about Entity Structure Diagrams (ESD) and Network Diagrams (ND) used for Jackson System Development (JSD). Download SmartDraw's trial version for free and draw JSD diagrams with ease.
http://www.smartdraw.com/tutorials/software/jsd/tutorial_01.htm

SMUG Book: Structured Programming - Several very good quotes that define and explain this topic.
http://www.robelle.com/library/smugbook/structpr.html

Go To Statement Considered Harmful - By Edsger W. Dijkstra. This short 1968 paper is widely considered the seminal work which began the Structured Programming movement, and is vital to grasp the motives of its creators. Reprinted as an ACM Classic of the Month. <small>(October, 1995)</small>
http://portal.acm.org/citation.cfm?id=362929.362947

Tutorial on Jackson System development - A lecture on JSP and JSD.
http://cisx2.uma.maine.edu/NickTemp/JSP&JSDLec/jsd.html