Analysis of return and volatility spillover between oil-gold and oil-bitcoin during the covid-19 pandemicAsty Khairi Inayah, Lesia Fatma Ginoga, Dahri Tanjungan, Resti Jayeng Ramadhanti and Novi RosyantiE3S Web Conf., 577 (2024) 02020DOI: https://doi.org/10.1051/e3sconf/202457702020