Long term prediction of nonlinear viscoelastic creep behaviour of elastomers: extended Schapery modelHatem Gacem, Yvon Chevalier, Jean-Luc Dion, Mohamed Soula and Brahim RezguiMécanique & Industries, 9 5 (2008) 407-416DOI: https://doi.org/10.1051/meca/2009003