Suzanne Robertson is co-author of Mastering the Requirements Process and has many very informative and interesting write ups to her name. Suzanne is author of many papers on systems engineering. The following are a few of the articles by her on Requirements testing:
An Early Start to Testing: How to Test Requirements
http://www.atlsysguild.com/GuildSite/SQR/Testreqs.html
Requirements Testing - Creating an Effective Feedback Loop
http://www.atlsysguild.com/GuildSite/SQR/testingloop.html
Requirements Driven Project Planning
http://www.atlsysguild.com/GuildSite/SQR/reqsdrivenproject.html
Requirements Patterns via Events / Use Cases
http://www.atlsysguild.com/GuildSite/SQR/Requirements_Patterns.html
REQUIREMENTS: MADE TO MEASURE by James Robertson and Suzanne Robertson
http://www.atlsysguild.com/GuildSite/Robs/apmeas.html