Physical meaning and measurement of the entropic parameter q in an inhomogeneous magnetic systemsM. S. Reis, V. S. Amaral, R. S. Sarthour and I. S. OliveiraEur. Phys. J. B, 50 1-2 (2006) 99-103DOI: https://doi.org/10.1140/epjb/e2006-00065-5