Don Brutzman, Leonard Daly (2011). Extensibel 3D Graphics for Web Authors (X3D). (Libro Impreso). Morgan Kaufmann, Elservier, ISBN 13: 978-0-12-088500-8
Alexander Osterwalder, Ives Pigneur (2014). Value Proposition Design How to create products and services costumers want. (e-book) . John Wiley & sons Inc. Haboken New Jeresy, ISBN 978-1-118-90807-9 (ebk)