Polyelectrolyte chains in poor solvent. A variational description of necklace formation G. Migliorini, N. Lee, V. Rostiashvili and T.A. Vilgis Eur. Phys. J. E, 6 3 (2001) 259-270 Published online: 15 November 2001 DOI: 10.1007/s101890170009