Ulfaty, D., M. Diantoro, W. Loeksmanto, and M.O. Tjia. 2016. “Oxygen Doping Effects on the Re-Entrant Point of Vortex Melting Line in Bi2Sr2CaCu2O8+δ and YBa2Cu3O7-δ Superconducting System”. Indonesian Journal of Physics 14 (3), 87-91. https://ijphysics.fi.itb.ac.id/index.php/ijp/article/view/85.