zulkifli mohd nopiah, ahmad kadri junoh and ahmad kamal ariffin.  (2015).  a novel hybrid fuzzy nonlinear weighted goal programming for optimising interior acoustics level in car cabin.  - journal of vibration and control.  1721-1744. 

djamaluddin f., abdullah s., ariffin a.k., nopiah z.m..  (2015).  optimization of foam-filled double circular tubes under axial and oblique impact loading conditions.  - thin-walled structures.  1-11. 

djamaluddin f., abdullah s., ariffin a.k., nopiah z.m..  (2015).  non-linear finite element analysis of bitubal circular tubes for progressive and bending collapses.  - international journal of mechanical sciences.  228-236.