Steady high viscosity liquid micro-jet production and fiber spinning using co-flowing gas conformation A. M. Gañán-Calvo, M. Pérez-Saborid, J. M. López-Herrera and J. M. Gordillo Eur. Phys. J. B, 39 1 (2004) 131-137 Published online: 18 June 2004 DOI: 10.1140/epjb/e2004-00178-9