Volume 19, Issue 2, February 2018, Pages 565-569
Urip Harahap; Poppy Anjelisa Zaitun Hasibuan; Panal Sitorus; Nur Arfian; Denny Satria
Volume 18, Issue 2, February 2017, Pages 399-403
Denny Satria; Jansen Silalahi; Ginda Haro; Syafruddin Ilyas; Poppy Anjelisa Zaitun Hasibuan
)