Experimental observation of non-s-wave superconducting behavior in bulk superconducting tunneling junctions of YBa2Cu3O7−δ and Bi2Sr2CaCu2O8+δ - Guerra, Leandro; Basco, Flordivino; Sarmago, Roland (Proceedings of the 16th National Physics Congress of the Samahang Pisika ng Pilipinas, 1998)