TY - JOUR AU - Gul Zaman TI - Qualitative Behavior of Giving Up Smoking Models JO - Bulletin of the Malaysian Mathematical Society PY - 2011 VL - 34 IS - 2 UR - http://geodesic.mathdoc.fr/item/BMMS_2011_34_2_a18/ ID - BMMS_2011_34_2_a18 ER -