@article{article16701bba,
title   = {Surface spin freezing of ferrite nanoparticles evidenced by magnetization measurements},
author = {Alves, C R and Aquino, R and Depeyrot, J and Cotta, T A P and Sousa, M H and Tourinho, F A and Rechenberg, Hercilio Rodolfo and Goya, Gerardo Fabían},
year = {2006},
doi = {10.1063/1.2163844}
}