P.  Poddar, Morales, M. B., Frey, N. A., Morrison, S. A., Carpenter, E. E., and Srikanth, H., ?Transverse susceptibility study of the effect of varying dipolar interactions on anisotropy peaks in a three-dimensional assembly of soft ferrite nanoparticles?, Journal of Applied Physics, vol. 104, no. 6, p. Article No. 063901, 2008.