| 1 | Introduction to Solid State Physics, Charles Kittel, 8th edition, 2004 |
| 2 | Photovoltaic Solar Energy: From Fundamentals to Applications, Wiley, 2017 |
| 3 | Power Harvesting via Smart Materials, SPIE, 2017 |
| 4 | Smart Materials, M. Schwartz, Taylor & Francis Group, 2009 |