[1] C Kompis, S Aliwell (Eds.), Energy harvesting technologies to enable remote and wireless sensing, Vodera Ltd., London (2008);
T Ryhanen et al. (Eds.), Nanotechnologies for future mobile devices, Cambridge U. Press, Cambridge, UK (2010);
A Lay-Ekuakille et al. (Eds.), Wearable and autonomous biomedical devices and systems for smart environment, Springer, Berlin (2010);
T J Kazmierski, S Beeby (Eds), Energy harvesting systems: Principles, modeling and applications, Springer, New York (2011);
Y K Tan (Ed.), Sustainable energy harvesting technologies: Past, present and future, InTech, Rijeka (2011).

[2] L Gammaitoni, I Neri, H Vocca, Nonlinear oscillators for vibration energy harvesting, Appl. Phys. Lett. 94, 164102 (2009).

[3] F Cottone, H Vocca, L Gammaitoni, Nonlinear energy harvesting, Phys. Rev. Lett. 102, 080601 (2009).

[4] L Gammaitoni, I Neri, H Vocca, The benefits of noise and nonlinearity: Extracting energy from random vibrations, Chem. Phys. Lett. 375, 435 (2010).

[5] J I Deza, R R Deza, H S Wio, Wide-spectrum energy harvesting out of colored Levy-like fluctuations, by monostable piezoelectric transducers, Europhys. Lett. 100, 38001 (2012).

[6] A Bohr, B R Mottelson, Nuclear structure, Benjamin, New York (1975).