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Hanieh Kargarzadeh, Ishak Ahmad, and Ibrahim Abdullah.  (2014).  Liquid Rubbers as toughening agents.  - .  Bab 2 (31-52). 

Ishak Ahmad, Ibrahim Abdullah and Mohd Fairus Mat Isa.  (2010).  Preparation and characterizations of polymer blends.  - .  20:107-112. 

Ishak Ahmad, Siti Farhana Hisham, Mohd Fairus Md Isa, Mohd Sukor Su`ait.  (2010).  Recycling of Polyethylene Terephtalate (PET) bottles.  - .  3:11-14.