How to do test estimation

http://sqa.fyicenter.com/FAQ/Testing-Techniques/How_to_do_Estimating_Testing_effort_.html


http://www.requirementdriventesting.com/testing-estimate/

http://www.qualitytesting.info/forum/topics/test-effort-estimation?id=2064344%3ATopic%3A458859&page=2#comments


Automation test estimation
http://www.stepinforum.org/Test_Automation/TA_finaltalk/PDFs/Papers/TEST%20AUTOMATION%20EFFORT%20ESTIMATION.pdf