?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=STEFANUS&rft.au=SAPUTRA%2C+STEFANUS&rft.aulast=SAPUTRA&rft.degree=Skripsi&rft.title=Deteksi+Malicious+Smart+Contract+Berbasis+Opcode+Menggunakan+Graph+Neural+Network&rft.inst=Sanata+Dharma+University&rft.date=2026