- ↑ Adobe Continues Charge Into eBook Market with the Acquisition of Glassbook, Adobe Systems. 2000-08-28. Archived 2000-10-04.
- ↑ Adobe has united Acrobat eBook Reader and Acrobat Reader in a single application, Adobe Systems. Archived 2003-08-01.
- Adobe Acrobat eBook Reader 2.1/ 2.2 at Adobe (archived 2001-03-08 / 2001-11-07)
- Glassbook official website (archived 2000-10-08, 1999-01-25)
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