For chapter four, note 12: You can read about the first conversion of a Prius to a plug-in Prius in a paper by Ovonic engineers and Professor Andrew Frank here.

In Chapter 10, the url for Note 11 is no longer accessible.

You can see the original news article on GM and Saab changing the description about their plug-in hybrids in the Swedish paper Aftonbladet here, and can read an account in English here.