@article{hyok-jon_sengupta_yakovenko_2003,  title={Theoretical prediction of the fractional ac Josephson effect in p- and d-wave superconductors},  volume={33},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332003000400002},  DOI={10.1590/S0103-97332003000400002},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Hyok-Jon, Kwon and Sengupta, K. and Yakovenko, Victor M.},  year={2003},  month={Dec},  pages={653–658} }