Bentz, W.Ito, T.Cloet, I.Thomas, A.Yazaki, K.Melnitchouk, W.2011-04-152011-04-152010Proceedings of Achievements and New Directions in Subatomic Physics: Festchrift in Honor of Tony Thomas 60th Birthday, held in Adelaide, South Australia, 15-19 February 2010 / W. Melnitchouk (ed.): pp.104-23797807354081110094-243X1551-7616http://hdl.handle.net/2440/63255A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented. We concentrate on the pion fragmentation function, taking into account cascade-like processes in a generalized jet-model approach. Numerical results obtained in this NJL-jet model are presented. © 2010 American Institute of Physics.en©2010 American Institute of PhysicsSemi-inclusive processesfragmentation functionseffective quark theories of QCDConference paper002010454610.1063/1.34793260002840340000182-s2.0-7864982410031551Thomas, A. [0000-0003-0026-499X]