Enhancement of Thermoelectric Properties in Cold Pressed Nickel Doped Bismuth Sulfide Compounds 由 Fitriani, Fitriani, Said, Suhana Mohd, Rozali, Shaifulazuar, Salleh, Faiz, Sabri, Mohd Faizul Mohd, Bui, Duc Long, Nakayama, Tadachika, Raihan, Ovik, Megat Hasnan, Megat Muhammad Ikhsan, Bashir, Mohamed Bashir Ali, Kamal, Farhan