@article{wilk_2007,  title={Fluctuations, correlations and non-extensivity},  volume={37},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332007000500009},  DOI={10.1590/S0103-97332007000500009},  number={2c},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Wilk, Grzegorz},  year={2007},  month={Jun},  pages={714–716} }