by Harahap, E, Badruzzaman, F H, Permanasari, Y, Fajar, M Y, Kudus, A
Published in Journal of physics. Conference series (01.10.2019)

by Suhaedi, D, Ishfahani, A A, Harahap, E H, Fajar, M Y, Rohaeni, O
Published in Journal of physics. Conference series (01.08.2020)

by Suhaedi, D, Fajar, M Y, Sukarsih, I, Permanasari, Y
Published in IOP conference series. Materials Science and Engineering (01.04.2020)

by Harahap, E, Badruzzaman, F H, Permanasari, Y, Fajar, M Y, Kudus, A
Published in IOP conference series. Materials Science and Engineering (01.04.2020)

by Permanasari, Y., Fajar, M. Y., Rohaeni, O., Suhaedi, D., Harahap, E. H.
Published in KnE Social Sciences (08.11.2022)

by Chung, H. S., Sayeed-Bin-Asad, S. M., Fajar, Berkah, Shin, Y. H., Jeong, H. M.
Published in Journal of Central South University (01.10.2011)