Suggestions for resizing hat can be found here:
http://smariek.blogspot.com/2008/01/chemo-cap-for-cap-karma.html

Stitch patterns used in this pattern are mentioned in the Pattern Post here:
http://smariek.blogspot.com/2007/06/utopia-hat.html
and also in the Pattern Bibliography post here:
http://smariek.blogspot.com/2007/11/pattern-bibliography.html
.