Medium-density fiberboard made from kenaf bast and core: effects of refining pressure and time on specific gas permeability by Nayeri, Majid Dehghan, Md Tahir, Paridah, Taghiyari, Hamid Reza, Alias, Aisyah Homaira, Karimi, Ali, Abdullah, Luqman Chuah, Bakar, Edi Suhaimi, Namvar, Faridah