Parametrisation-free determination of the shape parameters for the pion electromagnetic form factor B. Ananthanarayan, I. Caprini, Diganta Das and I. Sentitemsu Imsong Eur. Phys. J. C, 73 8 (2013) 2520 Published online: 09 August 2013 DOI: 10.1140/epjc/s10052-013-2520-9