“Characterization of thermo-physical and hardness properties of unsaturated polyester resin hybrid nano composites Sihama Issa Salih1, Waleed Bdaiwi Salih2, Husam Sakin Hamad2”, IJP, vol. 16, no. 37, pp. 136–148, Sep. 2018, doi: 10.30723/ijp.v16i37.85.