Suminar Pratapa Department of Physics, Faculty of Mathematics and Natural Sciences - ITS
Kampus ITS Keputih, Sukolilo, Surabaya 60111 Indonesia
Triwikantoro Triwikantoro Department of Physics, Faculty of Mathematics and Natural Sciences - ITS
Kampus ITS Keputih, Sukolilo, Surabaya 60111 Indonesia
Hariyati Purwaningsih Department of Materials Engineering, Faculty of Industrial Engineering - ITS
Kampus ITS Keputih, Sukolilo, Surabaya 60111 Indonesia