[1]  Beeby SP, Tudor MJ, White N (2006) Energy harvesting vibration sources for microsystems applications. Meas Sci Technol 17: R175.

[2]  Erturk A, Inman DJ (2011) Piezoelectric energy harvesting. John Wiley & Sons.

[3]  Jagtap SN, Paily R (2011) Geometry optimization of a MEMS-based energy harvesting device. in Students' Technology Symposium (TechSym) 265-269.

[4]  Patel R, McWilliam S, Popov A (2011) A geometric parameter study of piezoelectric coverage on a rectangular cantilever energy harvester. Smart Mater Struct 20(8): 085004.

[5]  Zhu M, Tiwari‌ A (2010) Design Study of piezoelectric energy-harvesting devices for generation of higher electrical power using a coupled piezoelectric-circuit finite element method. IEEE Trans Ultrason Ferroelect Freq Control 57(2): 427-437.

[6]  Ben Ayed S, Najar F, Abdelkefi A (2009) Shape improvement for piezoelectric energy harvesting applications. in Signals, Circuits and Systems (SCS) 1-6.

[7]  Roundy S, Leland ES, Baker J, Carleton E, Reilly E, Lai E (2005) Improving power output for vibration-based energy scavengers. IEEE Pervasive Comput 4(1): 28-36.

[8]  Hosseini R, Hamedi M (2015) An investigation into resonant frequency of trapezoidal V-shaped cantilever piezoelectric energy harvester. Microsyst Technol 1-8.

[9]  Yang B, KS Yun (2011) Efficient energy harvesting from human motion using wearable piezoelectric shell structures. in Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS) 2646-2649.

[10] Hu H, Xue H, Hu Y (2007) A spiral-shaped harvester with an improved harvesting element and an adaptive storage circuit. IEEE Trans Ultrason Ferroelect Freq Control 54: 1177-1187.

[11] Amin Karami M, Inman DJ (2012) Parametric study of zigzag microstructure for vibrational energy harvesting. J Microelectromech S 21(1): 145-160.

[12] Hosseini R, Hamedi M (2016) An investigation into resonant frequency of triangular V-shaped cantilever piezoelectric vibration energy harvester. J Solid Mech 8(3): 560-567.

[13] Hosseini R, Nouri M (2016) Shape design optimization of unimorph piezoelectric cantilever energy harvester. J Appl Comput Mech 47(2): 247-259.

[14] Thomson W (1996) Theory of vibration with applications. CRC Press.

[15] Rao SS (2007) Vibration of continuous systems. John Wiley & Sons.

[16] Yang K, Li Z, Jing Y, Chen D, T Ye (2009) Research on the resonant frequency formula of V-shaped cantilevers. in 2009 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems 59-62.

[17] Fakhzan AGAMMN (2013) Harvesting vibration energy using piezoelectric material: Modeling, simulation and experimental verification. Mechatron 23: 61-66.

[18] Ambrosio R, Gonzalez H, Moreno M, Torres A, Martinez R, Robles E (2014) Study of cantilever structures based on piezoelectric materials for energy harvesting at low frequency of vibration. in Advanced Materials Research 159-163.