de la Cruz, Clarina, Leandro Guerra, Roland Sarmago, & Arnel Salvador.
" Resistivity Measurements on Bulk Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub>: Contribution of Vortices at Low Magnetic Fields." <em>Science Diliman: A Journal of Pure and Applied Sciences</em> [Online], 11.2 (1999): n. pag. Web. 26 Sep. 2025