1. Cheng, W.X., Ding, A.L., Zheng, X.S., Qiu, P.S., and He, X.Y., J. Phys.: Conf. Series, 2009, vol. 152, p. 012036; doi:10.1088/1742-6596/152/1/012036.
2. Chitanu, E. and Gheorghe, I., Int. J. Comput., 2010, vol. 4, p. 243.
3. Lucas, B., El Armani, A., Moliton, A., and Dilhan, M., Superlattice Microst., 2077, vol. 42, p. 357.
4. Daugėla, J., Joneliūnas, S., Jotautis, A., Naujokaitis, R., and Klovaite, E., Electronics and Electrical Engineering, Kaunas: Technologija, 2005, vol. 63, p. 70.
5. Wang, Z.L. and Song, J.H., Science, 2006, vol. 312, p. 242.