@article{articled457abec,
title   = {Angular dependence of coercivity in 'ND'-'FE'-b sintered magnets: proof that coherent rotation is not involved},
author = {Cebollada, F and Rossignol, M F and Givord, D and Villas-Boas, Valquíria and González, J M},
year = {1995},
journal   = {Physical Review B}
}