Steady high viscosity liquid micro-jet production and fiber spinning using co-flowing gas conformationA. M. Gañán-Calvo, M. Pérez-Saborid, J. M. López-Herrera and J. M. GordilloEur. Phys. J. B, 39 1 (2004) 131-137DOI: https://doi.org/10.1140/epjb/e2004-00178-9