TY - JOUR AU - Ouafi, Rachid AU - Khelladi, Abdelkader TI - Non orthogonal cutting problem the case of trapezoidal pieces. JO - International Journal of Open Problems in Computer Science and Mathematics. IJOPCM PY - 2009 SP - 69 VL - 2 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IJOPCM_2009__2_1_229044/ LA - en ID - IJOPCM_2009__2_1_229044 ER -